Around 1,000 rockets, mortar shells and homemade projectiles were fired by Syrian rebels at two besieged Shiite towns in Idlib province on Monday, a monitoring group said.
There were reports of dead and injured in the heavy fire on Fuaa and Kafraya that started on Sunday night according to the Observatory for Human Rights.
Fuaa and Kafraya has been captured by an alliance, known as the Army of Conquest, that includes Al-Qaeda affiliate Al-Nusra Front.
The alliance began an attack against the villages on July 15 as a revenge for a regime offensive on Zabadani where the last rebel-held bastion along Syria’s border with Lebanon.
“The attack would give you a taste in the north of what our people are tasting in Zabadani,” it said.
More than 240,000 people have been killed in Syria since the conflict began with anti-government demonstrations in March 2011.