Syrian warplanes and artillery have pounded the central city of Homs, subjecting the former rebel stronghold to its worst bombardment in months, activists said.

A group of UN ceasefire observers has toured a rebel-held neighbourhood in the central Syrian city of Homs.

Syrian troops have resumed their shelling of residential neighbourhoods dominated by rebels in the central city of Homs, activists say.

Syrian troops shelled two rebel-held neighbourhoods in the central city of Homs today, activists said.