At least 22 people have been killed and dozens more were wounded in the blast
Authorities claim Isis has no presence in the country, where the Taliban is fighting a bloody insurgency
The beheadings happened after Isis made inroads into the Afghan province
Charities criticised the figures as British troops are sent back to Helmand province
They are being sent to a camp to advice Afghan forces still fighting the insurgency
Helmand is an important Taliban base as it produces most of the world’s opium
The hour-long Voice of the Caliphate consists mainly of interviews, anti-government messages and songs about Isis
The attack marks the deadliest day for American troops since June 2014
A Taliban spokesman said the attack targeted 'an invader's guest house'
Bergdahl: 'What I was seeing from my first unit all the way up into Afghanistan was leadership failure'
The American soldier has given his first media interview since being released last year
Defence ministry says at least 37 civilians and members of Afghan security forces have been killed and 35 wounded
A tribal elder tells Bilal Sarwary that the militants may storm the city again using looted heavy weapons, and how security forces have failed residents
'Her name is Shukria, which means thanks giving/thanks. What a slap to humanity'
'Under an Islamic system all rights of human beings — both men and women — need to be implemented 100 percent'
It is unclear how much support within the insurgency the new faction has