Artillery fire in Syria as fighting continues between President Bashar al-Assad's regime and protesters and rebel fighters.<br/> This amateur video, purportedly filmed in Homs, could not be independently verified by Reuters.<br/> Such footage frequently appears on social media websites as Assad battles to crush a 10-month-old uprising.<br/> A castle reportedly in Hama also comes under attack.<br/> Foreign powers are struggling to come up with a diplomatic solution to the crisis.<br/> On Tuesday, the Arab League will ask the United Nations to adopt a resolution calling on Assad to step down.<br/> The league is backed by the US, France and Britain, but China and Russia, some of Syria's few remaining allies, vetoed a previous resolution and say this one could pave the way for military intervention.<br/> Lindsey Parietti, Reuters
