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Isis is now just five kilometres away from the Syrian President's Presidential Palace after militants invaded a sprawling Palestinian refugee camp in Damascus.
The extremist group and members of the al-Qaeda affiliate Jabhat al-Nusra are believed to have taken control of up to 90 per cent of the Yarmouk camp, where over 18,000 mostly Palestinian men, women and children remain trapped.
Both groups have fought fiercely against each other in the past but appear to be working together during the Yarmouk assault. Nusra said in a statement it is taking a neutral stance, according to Reuters .
The camp is now also reportedly being shelled by forces loyal to President Bashar al-Assad.
The Syrian Observatory for Human Rights said five barrel bombs had been dropped on the camp on Monday morning, bringing the total number over the past three days to 25.
The London-based Observatory quoted local sources as saying one civilian man had been killed and others wounded by the alleged attacks. It had no information on how many people had been injured since Sunday.
Rami Abdurrahman, the founder and director, told The Independent about 2,000 refugees are estimated to have escaped the camp since it was overrun by militants.
Reports emerged yesterday of Isis militants beheading captives after taking over a large proportion of the camp. Mr Abdurrahman said two men were beheaded after the clashes broke out on Wednesday and five others were shot dead by militants.
He said the beheaded men appeared to have been aged between 25 and 35, but he did not know the ages of the other men. These reports could not be independently confirmed.
Palestinian families arrived at a makeshift center in Damascus, Syria, 5 April 2015 (EPA) Chris Gunness, a spokesman for the UN agency that supports Palestinian refugees known as UNRWA, described the situation inside as beyond “inhumane”. The UN Security Council convened an emergency meeting to assess the rapidly deteriorating conditions within the camp and appealed for the safe evacuation of refugees.
Pierre Krahenbuhl, the head of the UN agency for Palestinian refugees, called the situation "completely catastrophic”.
In pictures: Syria conflictShow all 40 1 /40In pictures: Syria conflict In pictures: Syria conflict Syria crisis Syrians carry children amid debris following a air strike by government forces in the northern city of Aleppo
In pictures: Syria conflict Syria crisis A Syrian man carries a girl on a street covered with dust following a air strike by government forces in the northern city of Aleppo
In pictures: Syria conflict Syria crisis Syrians react as they stand amid debris following a air strike by government forces in the northern city of Aleppo
In pictures: Syria conflict Syria crisis A Syrian man carries a girl amid debris following a air strike by government forces in the northern city of Aleppo
In pictures: Syria conflict Syria crisis An injured Syrian man walks out from the rubble of a destroyed building following a air strike by government forces in the northern city of Aleppo
In pictures: Syria conflict Syria crisis A Syrian woman makes her way through debris following a air strike by government forces in the northern city of Aleppo
In pictures: Syria conflict Syria crisis People stand on the rubble of collapsed buildings at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad, in the Al-Fardous neighbourhood of Aleppo
In pictures: Syria conflict Syria crisis Syrian residents stand amid the rubble of destroyed buildings
In pictures: Syria conflict Syria crisis A Syrian resident grasps a mattress amid rubble in the al-Firdous neighborhood of the northern city of Aleppo
In pictures: Syria conflict Syria crisis A view taken from Tel al-Sawadi shows a large explosion allegedly at the Wadi Deif Syrian army base in northwestern Idlib on May 14, 2014, which opposition fighters have been trying to capture for more than a year. The Syrian Observatory for Human Rights said Islamist rebels detonated explosives planted in a tunnel under the army base killing or injuring dozens.
AFP
In pictures: Syria conflict Syria crisis A bullet-riddled parking sign stands amid debris in a deserted street leading into the old city of Homs
In pictures: Syria conflict Syria crisis A general view shows abandoned buildings on a deserted square in the old city of Homs after Syrian government forces regained control of rebel-controlled areas
In pictures: Syria conflict Syria crisis A military vehicle that belongs to the Free Syrian Army is seen in Al-Amariya district in Aleppo
In pictures: Syria conflict Syria crisis A mosque is pictured through shattered glass in the old city of Homs, as rebel fighters withdrew from the city centre in line with a negotiated withdrawal deal with the government after having held out under tight siege for nearly two years
In pictures: Syria conflict Syria crisis Buses carrying Free Syrian Army fighters leaving Homs. Exhausted and worn out from a year-long siege, hundreds of Syrian rebels left their last remaining bastions in the heart of the central city of Homs under a cease-fire deal with government forces. The exit of some 1,200 fighters and civilians will mark a de facto end of the rebellion in the battered city, which was one of the first places to rise up against President Bashar Assad's rule, earning it the nickname of "capital of the revolution"
In pictures: Syria conflict Syria crisis Syrian government forces hold up a portrait of President Bashar al-Assad (L) while others raise the national flag on top of a pole in the old city of Homs
In pictures: Syria conflict Syria crisis Forces loyal to Syria's President Bashar al-Assad run through Aleppo's Bustan al-Qasr crossing after their release by rebels. They were freed as part of a larger deal which saw the last remaining Syrian rebels in central Homs city evacuate their positions and free captives in several locations in northern Syria
In pictures: Syria conflict Syria crisis A Syrian woman and two children walk past heavily damaged buildings in the northern city of Aleppo
In pictures: Syria conflict Syria crisis A man carries a wounded girl following a reported bombardment with explosive-packed "barrel bombs" by Syrian government forces in the al-Mowasalat neighborhood of the northern Syrian city of Aleppo
In pictures: Syria conflict Syria crisis A wounded man sits as he is treated at a makeshift hospital following a reported bombardment with explosive-packed "barrel bombs" by Syrian government forces in the al-Sakhour district of the northern city of Aleppo
In pictures: Syria conflict Syria crisis Debris rises in what Free Syrian Army fighters and Islamic rebels said was an operation to strike Al-Sahaba checkpoint, which is considered a gateway to Al-Dayf valley, and remove forces loyal to Syria's President Bashar Al-Assad in Maarat Al-Nouman, Idlib province
In pictures: Syria conflict Syria crisis Men try to put out fire at a site hit by what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in the town of Azaz, north of Aleppo, near the border with Turkey
In pictures: Syria conflict Syria crisis Civil Defence members try to put out fire
In pictures: Syria conflict Syria crisis Survivors react at a site hit by what activists said was an air strike by forces loyal to Syria's President Bashar al-Assad in the town of Azaz, north of Aleppo, near the border with Turkey
In pictures: Syria conflict Syria crisis Residents queue as they wait to receive food aid distributed by the UNRWA at the Palestinian refugee camp of Yarmouk, south of Damascus
In pictures: Syria conflict Syria crisis Belongings of Syrian rebels inside a chapel at Crac des Chevaliers, the world's best preserved medieval Crusader castle in Syria. The village was destroyed in fighting between the government and rebel forces while the castle, listed as a UNESCO world heritage site, also has been damaged over the past two years
In pictures: Syria conflict Syria crisis Hosen Sabah, a 16-year-old student is comforted by his mother at a hospital in Damascus. Nosen was wounded by a mortar outside his school, while 14 other students were killed and over 80 wounded
In pictures: Syria conflict Syria crisis A Free Syrian Army fighter works on a locally made launcher before firing it towards forces loyal to Syria's President Bashar Al-Assad in Mork town
In pictures: Syria conflict Syria crisis Syrian policemen and citizens inspecting the site of a car bomb at the entrance of Moadhamiyet al-Sham neighborhood in rural Damascus. According to Syria's Arab News Agency (SANA), a car bomb explosion has gone off in the countryside of Damascus and initial information say there are casualties, where a car rigged with explosions was remotely detonated at the entrance of Moadhamiyet al-Sham neighborhood in rural Damascus during engineering units it was trying to dismantled it
In pictures: Syria conflict Syria crisis Opposition fighters carrying a rocket launcher during clashes against government forces in the Sheikh Lutfi area, west of the airport in the northern Syrian city of Aleppo
In pictures: Syria conflict Syria crisis A Syrian man helps a woman to make her way through debris following reported air strikes by government forces in the Halak neighbourhood in northeastern Aleppo
In pictures: Syria conflict Syria crisis A Syrian man reacts as he carries the body of injured boy following reported air strikes by government forces in the Halak neighbourhood in northeastern Aleppo. According to the Syrian Observatory for Human Rights, at least 33 civilians were killed in the attack
In pictures: Syria conflict Syria crisis Syrian rescue workers carry the body of a woman following reported air strikes by government forces in the Halak neighbourhood in northeastern Aleppo
In pictures: Syria conflict Syria crisis A Syrian woman walks past the burning wreckage of a car following reported air strikes by government forces in the Halak neighbourhood in northeastern Aleppo
In pictures: Syria conflict Syria crisis A man and two children run to a safer place following reported air strikes by government forces in the Halak neighbourhood in northeastern Aleppo
In pictures: Syria conflict Syria crisis A man holds an injured child after, according to activists, two barrel bombs were thrown by forces loyal to Syria's president Bashar Al-Assad in Hullok neighbourhood of Aleppo
In pictures: Syria conflict Syria crisis An injured man talks on a walkie-talkie after, according to activists, two barrel bombs were thrown by forces loyal to Syria's president Bashar Al-Assad in Hellok neighbourhood of Aleppo
In pictures: Syria conflict Syria crisis A man walks inside a mosque damaged by, according to activists, a barrel bomb thrown by forces loyal to Syria's president Bashar Al-Assad in Old Aleppo
In pictures: Syria conflict Syria crisis Syrians gather at the site of reported air strikes by government forces in the Halak neighbourhood in northeastern Aleppo
In pictures: Syria conflict Syria crisis Rebel fighters carry their weapons as they run to avoid snipers loyal to Syria's President Bashar al-Assad in the town of Morek in Hama province
Yarmouk has been under a government siege for nearly two years, leading to civilians starving as aid workers struggle to distribute food assistance inside the camp. A report by The Independent found women were being shot at by snipers as they tried to gather plants to feed their starving children.
At its peak, the camp was home to 160,000 refugees who fled the area after fighting broke out between rebels and pro-Assad fighters. Only the most vulnerable remain trapped in the camp.
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