Syrian regime is 'hell-bent' on 'murdering and maiming' its own people, David Cameron says Many wounded are too afraid to seek help at hospitals, even when they can be reached. Injured victims of the Homs bombardment are being treated inside mosques or in clandestine, makeshift clinics located in private homes. "You cannot get proper medical attention in hiding," said Ms Bouchet-Saulnier. These kinds of clinics have to move frequently. You cannot deliver proper medical care in this way. The regime's denial of treatment to the injured was a breach of Article 3 of the Geneva Convention, she added. A person inside Homs said the essential work of "temporary field hospitals" was being obstructed by shelling and snipers. The sniper shots are continuous and therefore no-one can move inside the neighbourhood except with extreme precaution and risk to their lives. The person added: "We demand immediate help from charity organisations across the world and the Red Crescent." Another Homs resident said: "There is severe shortage in food and medical supplies. Even those who are not killed by the bombing are dying for lack of proper medical attention. The person added: "Some of the wounded are hard to grab from the streets because the snipers are targeting anyone who tries to save them. They're not even letting people bury the dead, so they have to do it in the middle of the night. The bombardment has targeted the largely Sunni areas of Homs where rebels of the Free Syrian Army have a strong presence, notably the district of Baba Amr. These quarters have effectively been sealed off by the army, leading to severe shortages of food, while the makeshift clinics often lack the most basic medical supplies. A source in the city said that movement into or out of Baba Amr had been almost impossible for the last four days. "There is a massive lack in nutritional supplies and in bread-making ingredients, and all the connections are cut," said the person. Human Rights Watch said that "government troops have fired hundreds of shells and mortars into populated neighbourhoods," killing at least 300 people since 3 Feb. "No adequate medical assistance is available to the victims due to a blockade of the city by government forces and fear of arrest if treated at government-controlled hospitals," added Human Rights Watch. The Arab League plans to revive an observer mission that was deployed in Syria for a few weeks last month. Ban Ki-Moon, the United Nations secretary general, said this could develop into a joint initiative with the UN to the curb the violence. Mr Ban voiced "deep regret" that Russian and Chinese vetoes had stopped the Security Council from agreeing a resolution on Sunday that would have urged Mr Assad to step down. "Thousands have been killed in cold blood, shredding President Assad's claims to speak for the Syrian people," added Mr Ban. I fear that the appalling brutality we are witnessing in Homs, with heavy weapons firing into civilian neighbourhoods, is a grim harbinger of worse to come. In total, 83 people were killed across the country yesterday, said the Syrian Observatory for Human Rights, a London-based group, adding that 63 died in Homs.