"The American coalition forces launched around 8:00 pm (1800 GMT) this evening several missiles against some positions of our forces in the Ghorab mountains south of Sukhna," causing only "damage to equipment," Sana said, citing a military source.

According to the monitoring Syrian Observatory for Human Rights, coalition forces positioned in the Al-Tanf region fired "more than 14 missiles" at a Syrian army convoy as it was passing through the desert in the far east of Homs province.

"The group was lost in the middle of the desert around 35 kilometres from the Al-Tanf base" of US and British troops, the Observatory's director Rami Abdel Rahmane told AFP.

The United States generally uses this base to launch its strikes against the Islamic State (IS) jihadists. It has also been used in the past to train Syrian opposition fighters.

Last year there were clashes in the region between Syrian regime forces and those supported by the coalition.

Damascus has called for the US forces to leave this area of Syria near the border with Iraq and Jordan.