Concern grows over conditions in Aleppo as the army offensive continues. Ian Pannell tells what the situation is in the Syrian city.

Aleppo is also Syria's industrial and financial centre and has enormous symbolic importance for both sides. The government says its determined to take back the parts under rebel control -- but as yet, neither side appears to have made a definitive breakthrough. The BBC's Ian Pannell has also been in Aleppo -- he described the state of the conflict to Ritula Shah on The World Tonight - BBC Radio 4.