More amateur video clips posted on social media website showed Homs being attacked by rocket and mortar fire.<br/> <br />The video, which Reuters cannot independently verify, showed members of the anti-government Free Syrian Army attacking a military checkpoint.<br/> <br />While another showed men running towards a house on fire.<br/> <br />British Prime Minister David Cameron, meeting with eight other European prime ministers in Sweden, said tough response is needed.<br/> <br />(SOUNDBITE)(English) BRITISH PRIME MINISTER DAVID CAMERON SAYING:<br/> <br />"It really is appalling, the scenes of destruction in Homs and it is quite clear that this is a regime that is hell-bent on killing, murdering and maiming its own citizens. So I think we need to take the toughest possible response we can, a tough response at the United Nations, which we have, and I was very disappointed obviously by the Russian and Chinese vetoes."<br/> <br />The Syrian Human Rights Organisation said this week's assault on Homs had killed at least 200 civilians.<br/> <br />International officials have estimated the overall death toll in Syria since last March at more than 5,000.<br/> <br />Sophia Soo, Reuters.
