**PLEASE NOTE: EDIT CONTAINS GRAPHIC MATERIAL**<br/> <br />REUTERS CANNOT INDEPENDENTLY VERIFY THE CONTENTS OF THESE VIDEOS, WHICH HAVE BEEN OBTAINED FROM A SOCIAL MEDIA WEBSITE<br/> <br />Chaos in Damascus as shelling hits what is said to be a Palestinian refugee camp.<br/> <br />Footage, which cannot be independently verified by Reuters, is said to show the aftermath of a mortar attack by Syrian security forces.<br/> <br />Medical sources said at least 20 people were killed as they prepared to break the Ramadan fast.<br/> <br />A separate video appeared to show victims inside the camp clinic.<br/> <br />Opposition activists say government troops were battling rebel forces in a nearby district when the mortar rounds hit.<br/> <br />More footage showed people gathering in protest at the camp which houses more than 100,000 people.<br/> <br />Many chanted anti-regime slogans and praised Syrian rebels who have been fighting to bring down the government for 17 months.<br/> <br />Sarah Charlton, Reuters.
