ROUGH CUT (NO REPORTER NARRATION).<br/> <br />Activist video posted to a social media web site purports to show heavy shelling in the battered Homs district of Khalidiya, where activists reported shelling at the rate of one per minute.<br/> <br />The footage appears shows an explosion shortly after the sound of a missile flying through the air. Another whiz follows and the cameraman, standing in a nearby building, pans across to show a ball of flames and smoke rising into the air.<br/> <br />Reuters is unable to independently verify the content of this video, which have been obtained from a social media web site.<br/> <br />Rami Abdelrahman, head of the British-based Syrian Observatory for Human Rights, said shells were being fired at a rate of one a minute. He said there had also been overnight clashes in rural Aleppo.<br/> <br />Syria blames the violence on "terrorists" seeking to topple President Bashar al-Assad and has repeatedly denied journalists access to the country, making it impossible to independently verify the reports.<br/> <br />Although violence has continued throughout the ceasefire, which has been in effect for four days, there has been a significant drop in the daily death toll from fighting, which in the past has killed more than 100 people a day.<br/> <br />On Saturday (April 14), 14 people were killed in the violence, Abdelrahman said and the state news agency SANA said "armed terrorists" killed five people in ambushes around the country.<br/> <br />A six-person advance party of United Nations (UN) observers is due to arrive in Syria to monitor the ceasefire -- meant to start four days ago.
