According to the Syrian Arab News Agency, the mortar attack also caused damage to several buildings in the city.
Besides, terrorists shelled the New Aleppo neighbourhood, the news agency added.
READ MORE: Trump Defends 'Slow' Withdrawal of US Troops From Syria
The news comes amid the changes in the country, caused by the withdrawal of the US troops announced on 19 December. US President Donald Trump noted later that the goal of American troops to eliminate the Daesh* terrorist group had been "mostly" achieved and thus the soldiers can now return home.
Syria has been in a state of civil war since 2011, with the government forces fighting against numerous opposition groups and terrorist organisations.
* Daesh (ISIL/ISIS/IS/Islamic State) is a terrorist organisation banned in Russia