Clashes in the rebel-held district of Salaheddin killed a rebel commander, the Britain-based Syrian Observatory for Human Rights said.

Meanwhile regime forces pounded the Palace of Justice in the heart of Aleppo, as well as the Marjeh and Shaar districts, the Britain-based Observatory said.

In Bab al-Nayrab too, regime forces shot dead a civilian while he was helping wounded people, the watchdog added.

A total of nine people were killed in violence in Aleppo on Monday, among them eight civilians, it said.

The NGO also reported another 19 deaths across the country in the early hours of Monday, 13 civilians and six rebels.

On Sunday, 131 people were killed in violence nationwide, the monitoring group said. They were 79 civilians, 42 regime troops and 10 rebels.

It is impossible to independently verify death tolls out of Syria, and the United Nations has stopped keeping a toll.