Syria crisis: Running battles on Aleppo's streets

Syrian forces have kept up a day-long ground and air attack against rebels in parts of the city of Aleppo.

The BBC's Ian Pannell, who is in Aleppo, has seen fierce battles, with a number of rebel fighters killed.

Rebels with the Free Syrian Army (FSA) say they have repelled an army incursion and destroyed tanks, but there is no independent verification.