Smoke from buildings in Homs
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Shelling targets Homs civilians, says activist

15 April 2012 Last updated at 18:20 BST

Fresh clashes have erupted in Syria as a vanguard of UN monitors prepares to arrive to oversee the shaky ceasefire.

Syrian state media claim that attacks by "terrorists groups" have intensified since Thursday's truce.

Sami Ibrahim, who is an activist in Homs, said his footage showed that the regime was targeting civilian buildings, and that a well-known market had been destroyed.

These pictures have not been independently verified