The US-led anti-ISIS coalition is building a new military base in Syria’s northern province of Raqqa, The New Arab reported, citing a source close to the Kurdish-led Syrian Democratic Forces (SDF).

The US backs the SDF and keeps about 900 troops (officially at least) in eastern Syria, allowing the US to control about one-third of Syria’s territory. The report said there are currently about 24 US-led military sites spread throughout eastern Syria.