Warnings from Syrian activists of a humanitarian catastrophe in Homs grew more desperate today as government forces resumed shelling an opposition stronghold in the city.

Two foreign journalists have been killed by Syrian government troops shelling the city of Homs, an opposition activist reported today.

The Red Cross has called for a daily two-hour ceasefire in Syria so that it can deliver emergency aid and reach people who are wounded or sick.

Syrian troops have continued shelling residential neighbourhoods in the central city of Homs for the fifth straight day, killing scores of people, activists said.

At least 12 people were killed today as Syrian troops shelled parts of the city of Homs, striking a makeshift medical clinic and residential areas, activists said.