Syrian pro-government forces take part in an operation to take control of Aleppo's Suleiman al-Halabi neighbourhood, which is divided by the frontline that separates the rebel-held east and regime-held west of the northern city, on September 30, 2016. (AFP/Xinhua)

DAMASCUS, Sept. 30 (Xinhua) -- At least 15 people were killed and 55 others were wounded Friday by mortar shelling on government-controlled areas in the northern city of Aleppo, state news agency SANA reported.

The shelling targeted several residential areas in the government-controlled parts in western Aleppo, the latest in a series of attacks the rebels in eastern Aleppo are waging to quell the momentum of the Syrian government forces, which are making notable gains in Aleppo.

Meanwhile, a military source told Xinhua that the Syrian army has captured several buildings in the rebel-held areas of Slaiman al-Halabi. The army also seized parts in the Bustan al-Basha area in the old city of Aleppo, including a church.

This comes as the Syrian army succeeded to recapture the Handarat Camp for Palestinian refugees, after taking and losing it again last week.

The renewed military showdown in Aleppo came just two weeks after a Russia-U.S. brokered truce expired with no extension.

Last week, the Syrian army declared the beginning of a new offensive on rebel-held areas in eastern Aleppo, urging the civilians to leave those areas and advised the rebels to surrender.

Aleppo has a strategic importance for the warring parties due to its location near the Turkish borders, and being Syria's largest province, and once the economic hub of Syria.