Heavy smoke and gunfire in Homs. The video posted to a social media website purports to show security forces storming and shelling the city. Activists say that several people several people have been killed in a government crackdown.<br/> In Nahir Asha near Damascus, security forces can be seen arresting a young boy and leading a woman away from a building.<br/> Reuters cannot independently verify the content of video<br/> At least 20 people were killed in clashes across Syria on Wednesday.<br/> Deborah Gembara, Reuters.
