Washington
The trucks crossed into the Syria through the al-Walid border crossing from the Iraqi Kurdistan region on Saturday, Xinhua news agency quoted the Syrian Observatory for Human Rights as saying on Sunday.
The shipment is the latest to reach US bases in Hasakah.
On August 7, US armoured vehicles entered areas in northeastern Syria and reached US bases in the region.
The US 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 Damascus government.
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