At least 42 people, mostly civilians, have been killed, and many more injured, following an air attack on a mosque in northern Syria.
At least 38 pro-government troops have been killed, after rebels blew up a tunnel, beneath a building, in the Syrian city of Aleppo.
At least 500 people have been killed, since the beginning of an offensive, on the Aleppo province, in Syria, by army troops and allied forces, in early February.
At least 64 people, including 28 children, have been killed, by air raids, carried out by Syrian and Russian aircraft, in Syria’s Aleppo province.
At least 12 hospitals have been struck, by airstrikes, killing at least 35 medical staff and patients, over the past weeks, in Syria.
At least 47 fighters have been killed, following heavy clashes between Islamic State militants, and rival Syrian rebels, in northern Syria.
A Free Syrian army commander has been killed, following a bomb attack, on his car, in southeastern Turkey.
At least 37 insurgents, from rival groups to the Islamic State, have been killed, and a further 20 are missing, following an attack by Islamic State militants in Syria.
A prominent Syrian rebel figure has been killed, following an attack by two suicide bombers targeting a local headquarters in the northwestern Syrian province of Idlib.
At least 14 people, including seven children, have been killed in bombing, using barrel bombs, on the northern Syrian province of Aleppo, by helicopters loyal to the Syrian regime.