The US forces have brought 40 truckloads of military gear and armored vehicles from Iraq to US bases in Syria's northeastern province of Hasakah, a war watchdog reported Sunday.
The military gear crossed into the Syrian territory through the al-Walid border crossing from the Iraqi Kurdistan region on Saturday, said the Syrian Observatory for Human Rights.
The shipment is the latest to reach US bases in Hasakah.
On Aug. 7, US armored vehicles entered areas in northeastern Syria and reached US bases in the region.
The United States maintains several bases in areas controlled by the Kurdish-led Syrian Democratic Forces (SDF) in Hasakah.
The Syrian government has repeatedly slammed the US troops present in Syria as forces of occupation, saying they entered the country without the consent of the Syrian government.