A bomb slams into what activists say is the beleagured Syrian city of Homs.<br/> <br />It was one of three cities reportedly pounded by government air strikes on Saturday.<br/> <br />Other amatuer videos are said to show shelling in Syria's capital, Damascus, and Aleppo, the country's biggest city.<br/> <br />Reuters cannot independently verify the content of these videos, which came from a social media website.<br/> <br />Meanwhile, in Germany US Vice President Joe Biden met with the head of Syria's main opposition coalition, Mouaz Alkhatib.<br/> <br />The meeting comes as the US weighs whether to intervene in the Syrian conflict, which has claimed an estimated 60,000 lives.<br/> <br />Also on Saturday, Russian foreign minister Sergei Lavrov said he opposed using force to set up humanitarian safe zones inside Syria.<br/> <br />(SOUNDBITE) (English) RUSSIAN FOREIGN MINISTER, SERGEI LAVROV, SAYING:<br/> <br />"The situation on the ground requires not more military assets but immediate ceasefire and an immediate end to violence."<br/> <br />Moscow has been one the few backers of Syrian President Bashar al Assad during what has been a bloody 22-month uprising.
