This video purports to show a military vehicle spewing gunfire as it speeds through a street in Homs, Syria.<br/> Obtained from a social media web site - the video, which cannot be independently verified by Reuters, also depicts protesters chanting and dancing in a rally against Syrian President Bashar al-Assad.<br/> Activists say Syrian forces killed 13 people during the widespread protests in Homs and Deraa on Friday...one day after Syria's ally Russia sharpened criticism of Damascus in a United Nations draft resolution.<br/> Russia's move paves the way for the 15-nation Security Council panel to issue its first statement of purpose on Assad's crackdown.<br/> Observers say two hundred thousand people attended the rally in Homs, during which the video shows images of government officials hanging from a mock gallows.<br/> Exact numbers of protesters could not be confirmed because Syria bars most independent journalists.<br/> The United Nations estimates 5,000 people have been killed in nine months of protests against Assad's rule.<br/> Katharine Jackson, Reuters.