UN: Syrian helicopters firing on rebel towns

International mediator Kofi Annan also said he was gravely concerned about violence in Homs and in Haffeh, a mainly Sunni Muslim town, where the US state department said it feared a “potential massacre”.
The UN observers, tasked with monitoring Annan’s April ceasefire deal, have instead been cataloguing mass killings, bombings and clashes in which many hundreds of Syrians have died.