Library image of IS fighters.
Hundreds of so-called Islamic State (IS) supporters have escaped from a camp in Syria, according to Kurdish officials.
They said in a statement that 950 IS supporters escaped after attacking guards and storming the gates at the Ain Issa displacement camp.
Jelal Ayaf, a senior official at the camp, told local media that 859 people escaped from the section housing foreigners.
He said a few were recaptured but that supporters inside the other section of the camp had also escaped and were carrying out attacks.
He described the situation as "very volatile".
It comes as Turkish troops continue to advance through the region after launching an offensive against Kurdish-led forces.
The United Nations says more than 130,000 people have fled their homes since the assault began on Wednesday.
The Britain-based Syrian Observatory for Human Rights said Turkish warplanes struck villages near the camp on Sunday.
It is home to around 12,000 displaced people, including nearly 1,000 foreign women with links to IS, plus their children.
The camp, which is 20 miles south of the Turkish border, is also close to a US-led coalition base.
A US military official said a "small group" of American troops withdrew from the base in Ain Issa because of the threat posed by Syrian fighters allied with Turkey.
The official said the situation across the country's north-east was "deteriorating rapidly" and that American forces were cut off from the Syrian Kurdish fighters they had previously partnered with.
Meanwhile, the US Defense Secretary has announced the US is preparing to evacuate around 1,000 troops from northern Syria.
Mark Esper said the troops would move south rather leaving the country entirely.
There have been concerns that the Turkish offensive and the initial withdrawal of US troops from the area earlier this week could lead to an IS resurgence.
The Kurdish-led Syrian Democratic Forces (SDF) fought alongside US troops against IS, playing a key role in the fall of the group's self-proclaimed Caliphate.
The UK also played a role in the defeat of IS in Syria, as part of Operation Shader.
On Saturday, Foreign Secretary Dominic Raab said he feared the Turkish offensive was "weakening the overarching counter-terrorism goal of countering Daesh (IS)."
He said the UK was "very concerned we're taking our eye off the ball".