The Syrian Observatory for Human Rights, a British-based war monitor, said about 10 shells had fallen in al-Hamdaniya district in southwest Aleppo.
Rebels seeking to oust Syrian President Bashar al-Assad have frequently shelled the areas of Aleppo that have been under government control throughout the conflict, which began in 2011.
The destruction in those parts of the city has been far less than in the eastern districts that rebels held until this month.
The last rebels left the city late on Thursday for the countryside immediately to the west of Aleppo, under a ceasefire deal in which the International Committee of the Red Cross said about 35,000 people, mostly civilians, had departed.
Many of those who left the city are now living as refugees in the areas to the west and south of Aleppo, including in Idlib province where bulldozers were used to clear heavy snowfall on Friday morning, the opposition Orient television showed. source