Syria's Kurdish-led Syrian Democratic Forces said on Wednesday the group had not received any plans from the US forces in northern and eastern Syria to withdraw.
"Of course, ISIS and other malicious forces are waiting for the opportunity of the US withdrawal to reactivate and reach the state of 2014," the SDF's spokesperson Farhad Shami told Reuters.
At the height of its powers in 2014, ISIS imposed a reign of terror over millions of people and claimed control over swathes of the combined territories of Iraq and Syria.
The US Department of Defense is developing plans to withdraw all US troops from Syria, NBC News reported on Wednesday, citing two US defense officials.
The US considers the Kurdish-led forces key allies against ISIS but neighbouring Türkiye regards them as a national security threat.