Pentagon announced earlier on Tuesday that the US-led coalition has conducted a new strike on pro-Syrian government forces as they were entering a de-confliction zone near At Tanf.
"Two soldiers of the Syrian army were killed, more than 15 were injured as a result of US air strikes in the Syrian desert," the source said.
On May 18, the coalition conducted its first airstrike against the pro-government forces, which the United States believes are backed by Iran, as it was moving inside a well-established de-confliction zone in southern Syria.
The United States and Russia signed the bilateral memorandum of understanding in October 2015 to ensure their flight safety during combat missions over Syria.
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