Russia's warplanes killed two women and two children were fleeing ISIS-held territory near Raqq city on Monday, local activists told Ammar Johmani as regime forces and allied militia pressed new gains.
The Russian warplanes hit a crowd of displaced people near madan town, ISIS last foothold in the southeastern countryside of Raqqa province.
the heavy aerial bombing in support of regime forces extended most ISIS held areas.
On Sunday, regime forces forces and their allies advanced toward the provincial boundary between Raqqa and Deir al-Zor took place late on Saturday, the media unit, run by Damascus ally Lebanese Hezbollah, and the British-based Syrian Observatory for Human Rights said.
The army seized an oil field in the Sabkha area as part of the advance.
It was a rare advance for Damascus's forces in that area, which is close to territory controlled by the U.S.-backed Syrian Democratic Forces (SDF), a Kurdish-dominated alliance separately fighting Islamic State. It also brings government forces closer to Deir al-Zor province, another Islamic State stronghold.
The Syrian army has active front lines with Islamic State in western Raqqa province and has made recent gains there.
Incidents between the Syrian military and SDF last month raised tension between Washington and Damascus and its ally Moscow.
