The Syrian army has renewed its heavy shelling of rebel-held areas of Aleppo, the country's commercial capital, anti-government activists have said, forcing the armed opposition to withdraw from at least one neighbourhood.

Intense bombardment rocked the neighbourhoods of Saleheddin, Hanano, Saif al-Dawla, Shaar and Shakur  on Thursday, anti-government groups have said.

The army attacks are part of the government's continuing air and ground assaults on Aleppo, which is being defended by armed members of the movement to overthrow Bashar al-Assad, the Syrian president.

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