After intense shelling, the Syrian Army is attempting to prevent the terrorist group from breaking through to the city's center.
"The Syrian troops are engaged in heavy defensive fighting to prevent terrorists from breaking through to the center of Aleppo," the Russian Center for Syrian reconciliation said.
The shelling by tanks, multiple launch rocket systems (MLRS), and mortars continued for roughly half-an-hour.
Earlier on Monday, the Syrian Army declared an end to the ceasefire, citing repeated breaches by rebel groups.
"The ceasefire regime should have been a real chance to stop bloodshed, but units of terrorists did not adhere to any of the points of the agreement," SANA news agency quoted Syrian Army General Command as saying.
"The number of ceasefire violations surpassed 300."
The statement added that the Syrian government forces made very effort to comply with the peace plan, agreed to by Russian Foreign Minister Sergei Lavrov and US Secretary of State John Kerry on September 9.
