Syrian government and opposition factions say Syrian armed groups have launched a large-scale attack on areas controlled by government forces, setting off fierce clashes for the second day.

Russian forces in Syria are under attack from rebel groups in the Syrian capital, Aleppo, in response to increased strikes.

Syrian rebels in the last opposition enclave in northern Syria launched on Wednesday a wide-scale military operation against the Syrian army and seized territory in the first such advance in years, army and rebel sources said.

Syrian armed opposition groups, led by Hayat Tahrir al-Sham, have claimed to have seized over 15 villages, a military base and captured soldiers.

Syrian rebels have launched a large-scale attack on regime forces in western Aleppo, according to a Free Syrian Army source and local residents, marking the first major flare-up in years between both sides.

Russian and Syrian forces have launched airstrikes on northwest Syria to counter a major rebel offensive led by Hayat Tahrir al-Sham near Aleppo

In a significant escalation, Syrian opposition factions have launched their largest offensive in years against regime and Iranian forces in the Aleppo countryside, reports Rizik Alabi of The Media Line.

Scores of people were killed after forces opposed to the government of President Bashar al-Assad overtook a Syrian military base, a monitoring group reported.

Turkish security sources say the operation seeks to restore the internal borders per 2019 de-escalation zone deal but Ankara tried to avoid it

Syria's opposition groups say armed forces launched a large-scale attack on areas controlled by government forces and seized territory in northwestern Syria

Extremist rebels in Syria have overrun an army base and took over at least 13 villages in one of the biggest flare-ups of violence in years in the country's north-east. The rebels launched a surprise attack on the Syrian army in the northern province of Aleppo,