Hours after the shelling, helicopter gunships struck rebels position in neighborhood of Maadi.

State TV said the shelling on the predominantly Christian and Armenian neighborhood of Suleimaniyeh in Aleppo early Saturday killed nine people, wounded another 50 and damaged several buildings.

Syrian rebels have shelled residential areas in government-held parts of the contested city in the past, killing hundreds of people.

State TV said the rebels shelled the neighborhood with a so-called Hell Cannon, a crude, locally made weapon that fires gas cylinders filled with explosives. The projectiles cause widespread damage and cannot be precisely targeted. State TV showed a building with its top three stories collapsed.

Aleppo, Syria's largest city and its former commercial hub, became a key front in the war after rebels launched an offensive there in July 2012.

Pierre Krahenbuhl, head of the U.N. agency for Palestinian refugees, known as UNRWA, was meanwhile set to meet with Syrian and U.N. officials in Damascus about the humanitarian situation in Yarmouk camp, agency spokesman Chris Gunness said.

Gunness said in a statement that there are deepening concerns over the safety of some 18,000 Palestinian and Syrian civilians, including 3,500 children, who remain in the camp.

Gunness later wrote on his Twitter account that UNRWA treated 31 Yarmouk evacuees, including two pregnant women who fled to the nearby neighborhood of Tadamon. He added that the youngest displaced person from the camp is six weeks old.

ISIS terrorist’s fighters overran much of Yarmouk last week. Residents say there is barely enough food and water, and hospitals have long run out of drugs and supplies.

The Syrian government has said it will launch a military operation in Yarmouk to evict militants.