Several missiles have targeted a US military base in al-Omar oil field, near Syria’s Dayr al-Zawr on Friday, local media reported.

According to Syria’s General Organization of Radio and TV, several missiles were fired at the base. After the attack, US helicopters were seen in the area. No further details were given.

A larger part of Syria’s Deir ez-Zor, Raqqa and al-Hasakah governorates is currently controlled by the US-backed Kurdish Syrian Democratic Forces (SDF).

Since 2015, the US command has set up nine military bases in this area. Damascus brands the United States’ military presence on Syria’s territory as an occupation.