Syrian rebel shelling of a school in government-held western Aleppo killed at least seven children on Sunday morning, the Syrian Observatory for Human Rights monitoring group reported.
At least 27 civilians were killed in regime air strikes, barrel bomb attacks and artillery fire on the rebel-held side of Syria's Aleppo city on Saturday, a monitor said.
Syrian aircraft and artillery pounded rebel-held areas of Aleppo early Friday as Damascus and its ally Moscow intensified a renewed offensive against the rebels.
Syrian air strikes and shelling killed 25 civilians in eastern districts of Aleppo on Thursday, a monitor said, on the third day of a wide-ranging regime assault on rebel-held areas.
Air strikes battered neighbourhoods around a children's hospital and a blood bank in rebel-held eastern Aleppo on Wednesday in a second day of renewed bombing that has killed at least 32 people, a war monitor, medics and emergency workers said.
Syrian and Russian warplanes bombed rebel-held areas in Aleppo and Idlib province overnight, a monitor said, a day after Moscow announced a fresh offensive against opponents of its Damascus ally.
A Russian-declared ceasefire for opposition-held areas of Syria's second city Aleppo took effect on Friday, but hopes were low that civilians or rebels would heed calls to leave.
Syrian rebels renewed their bid to break a government siege on eastern Aleppo on Thursday, shelling regime-held parts of the city, hours before a brief Russian-declared ceasefire was due to begin.
Syrian rebels opened a new front in Aleppo as fighting spread on the third day of a major insurgent counter-attack to break the government's siege of the opposition-held part of the city, and each side accused the other using poison gas.
Syrian rebels launched a major assault Friday aimed at breaking a months-long siege of opposition-held districts of Aleppo, as regime ally Russia held off on renewed air strikes.
Syrian rebels launched Grad rockets at Aleppo's Nairab air base on Friday, part of their preparations for a new offensive aimed at breaking the government siege of insurgent-held areas of the city, a rebel official and a monitoring group said.
Shelling by Syrian rebels killed several children at a school in government-held western Aleppo on Thursday, state media and a monitoring group said, just a day after air strikes on a school in a rebel-held village in Idlib, 50km away.
