Shells hit a building in Jobar, Damascus on Friday - as Syrian government forces battle to recapture parts of the city from rebels, according to opposition activists.<br/> <br />Rebel fighters broke through government lines here on Wednesday, seizing control of sections of the Damascus ring road - just 2 kilometres from security bases in the heart of the city.<br/> <br />Amateur videos like this one and others posted on to social media websites - which Reuters cannot independently verify - purportedly show heavy shelling and airstrikes in various parts of the capital.<br/> <br />This video is said to show the aftermath of an airstrike in the al-Qadam district of Damascus which rebels blame on an air strike by a Mig fighter.<br/> <br />Another - allegedly filmed on Saturday - shows significant damage in the town of Madyara.<br/> <br />President Bashar al-Assad is struggling to contain a revolt in which 60,000 people have been killed since March 2011.<br/> <br />While he's lost control of large parts of Syria, his forces have so far kept rebels out of central Damascus.<br/> <br />There were more scenes of destruction in the town of Hass in Idlib on Friday with this video purportedly showing the aftermath of another air strike.<br/> <br />Opposition activists said 44 people were killed in Damascus on Friday.