Sporadic firefights erupted between the Syrian Arab Army (SAA) and the Syrian Democratic Forces (SDF) south of Tabqah in the province of Raqqah last night.
The tensions grew following the US attack against a Syrian warplane near the ISIS-held town of Resafa.
According to pro-governnment sources, the had opposed government forces attempt to conduct a pilot rescue operation south of Tabqah. This led to clashes in the area.
The fate of the Su-22 pilot remains unclear.