At least 150 US soldiers have entered Kurdish-controlled territory in northeastern Syria, the government’s official news agency has reported.

The state news outlet SANA on Thursday said officials at the country’s foreign ministry rejected the presence of the soldiers at the Rmelan area calling it “illegitimate”.

“This intervention is rejected and illegitimate, and it happened without the Syrian government’s approval,” the source said, according to SANA.

The government said the move by the US was a “blatant act of aggression that constitutes a dangerous intervention and a gross violation of the Syrian sovereignty”, further calling for international action to prevent it.

The US has previously denied operating a base in Rmelan despite satellite imageryshowing the expansion of an airstrip in the area.