Two people have been arrested in the Turkish capital of Ankara on suspicion of planning a suicide attack on the city on New Year's Eve.
Turkish television channel NTV reported that the would-be bombers travelled from Isis-controlled Syria to Turkey to carry out the attacks.
An official told Reuters the two men - who are believed to be Turkish nationals - were thought to have been preparing an attack on Kizilay square in central Ankara where crowds usually gather to celebrate the New Year.
The state run news agency, Andalou Agency, said the pair were detained in a house raid in the Mamak district on the outskirts of the city on Wednesday morning.
The agency quoted an official from the chief prosecutor's office who said police seized suicide vests loaded with bombs that are believed to have been fortified with ball bearings and metal sticks.
The men - identified only by their initials M.C. and A.Y. - were allegedly planning to detonate their vests near bars and a shopping mall during the celebrations.
Ankara explosions - in pictures
Ankara explosions - in pictures
1/15 Ankara attack
Family members of Korkmaz Tedik, a victim of bomb blastsin Ankara, mourn over his coffin during a funeral ceremony
2/15 Ankara attack
Women carry the coffin of Sarigul Tuylu who was killed in a blast in Ankara during a funeral in Istanbul
3/15 Ankara attack
Police use tear gas and water cannon to disperse people marching to protest the double suicide bombing in Ankara
4/15 Ankara attack
The father of Sarigul Tuylu, 35, a mother of two that was killed in bombing attacks in Ankara, Turkey, is carried away after he fainted during her funeral in Istanbul
5/15 Ankara attack
A man lowers the body of Sarigul Tuylu, 35, a mother of two that was killed in bombing attacks in Ankara, Turkey, during her funeral in Istanbul
6/15 Ankara attack
Mourners chant slogans as they escort a vehicle carrying the coffin of Sarigul Tuylu, 35, a mother of two that was killed in bombing attacks in Ankara, Turkey, during her funeral in Istanbul
7/15 Ankara attack
Victims lie on the street as the scene of the explosion is cordoned off following an explosion at the main train station in Turkey's capital Ankara, on October 10, 2015.
8/15 Ankara attack
An injured man holds another casualty after the blasts in Ankara
9/15 Ankara attack
An injured woman being helped following the explosion on Saturday morning.
10/15 Ankara attack
An injured person is comforted as she lies on a rally banner following an explosion at the main train station in Turkey's capital Ankara, on October 10, 2015.
11/15 Ankara attack
Bodies of victims are covered with flags and banners as police officers secure the area after an explosion in Ankara, Turkey, Saturday, Oct. 10, 2015.
12/15 Ankara attack
Blood covered flags are seen at the blast scene after an explosion during a peace march in Ankara, October 10, 2015 Turkey.
13/15 Ankara attack
An injured person is lifted away using a rally banner following an explosion at the main train station in Turkey's capital Ankara, on October 10, 2015.
14/15 Ankara attack
Victims at the blast scene after an explosion during a peace march in Ankara, October 10, 2015 in Ankara, Turkey
15/15 Ankara attack
Paramedics and police work outside Ankara Central Station after multiple explosions in Turkey, 10 October 2015.
They are now in custody and are being interviewed by Turkish police.
It comes just two months after two suicide bombers killed 103 people who gathered for a peace rally outside Ankara's main train station.
Isis has stepped up its attacks on the Turkish state after it began an aerial bombing campaign against the terror group following a suicide attack on the border town of Suruc in July which killed more than 30 people.
Turkey has a 900 km (550 mile) border with Syria - which is partially controlled by Isis on the Syrian side - which has been used to smuggle would-be jihadists in Europe to carry out attacks since the beginning of the Syrian civil war in 2011.
Additional reporting by agencies