US snipers in Fallujah were widely reported as shooting at anything that moved.
Ms Mulhearn, 34, said the situation in Fallujah was reaching the point of an humanitarian crisis.
Many families were stuck there with few supplies because US soldiers would not allow them to leave, she said.
"Even during a so-called ceasefire, Fallujah was under siege with bombing, missiles and mortar attacks," she said.
"But the worst form of attack was the US snipers hiding on rooftops who kill hundreds of civilians as they tried to move about the city."
The official number killed in Fallujah is 600, but the total number of civilian casualties is likely much higher. The official tally only reflects
those deaths reported by the cities mosques and clinics. But American snipers and bombers have killed many people while they are inside their homes.
The doctor says his ambulance was attacked multiple times as it sought to bring aid to residents stranded in their homes. Once when it was trying to
retrieve dead bodies for burial and a second time when it was attempting to bring food aid to homes cut off by American snipers
"I see people carrying a white flag and yelling for us saying 'We are here' just try to save us but we cannot save them because whenever we open
the ambulance they will shoot us. We try to carry food or water by constrainers. As soon as you carry food or water, the snipers shot the containers
Abu Muher said US warplanes were bombing the city heavily last Saturday prior to his departure, and that Marine snipers continued to take their toll,
shot after shot, on residents of the besieged city. "There were so many snipers, anyone leaving their house was killed," he recalled.
Abu Muher, along with two other men from Fallujah who arrived in Baghdad last weekend, said American warplanes had dropped cluster bombs on a road
behind their houses in Fallujah. One of the men was too afraid to permit his name to be used in this article. "My neighbors saw the bomblets," he
said, "and I heard the horrible sound that only the cluster bombs make when they are dropped on us. My home was hit by their shrapnel. I was too
afraid to leave my home to look for myself because of the snipers."
Abdul Aziz, the 15 year-old son of Abu Muher, stated, "I saw two of my neighbors shot by US snipers when I went outside one time. I also saw some of
the small cluster bombs on the ground that were dropped by the warplanes of the Americans. Most times, we were too afraid even to look out of our
MR Now, we have been hearing there is a cease-fire. Is there a cease-fire in effect?
LG No, quite the opposite. Effectively they are fighting. The US has snipers around the city from the West into the center, in houses all around the
main streets and are picking off people on the streets, cars and ambulances.
MR Do you mean they are actually firing on ambulances?
LG Yeah, I mean, indeed. My colleague and I and some international volunteers from the United Kingdom and the US had to take over the responsibility
for getting patients out of bomb damaged hospitals to one of the remaining make-shift hospitals, which is actually a converted doctors surgery
effectively - because the ambulances were being shot at by the US forces. In fact, my colleague who is not very far away from me at the moment, was in
one of the last functioning ambulances in Fallujah when he was sniped driving. I think they fired four or five rounds at it, just missing him, I think
the ambulance was destroyed. When we left, that was this morning, that was the last ambulance - more or less - in Fallujah.
MR What's the scene been like today? You said you left Fallujah this morning, what was it like?
LG The hospital I was at this morning had a normal night. There were Drones and Helicopters overhead scoping targets, shelling and bombing, mainly of
houses in civilian areas. The wounded trickle in, but at a slow rate, it's what people can bring in. There aren't any ambulances so, if anyone has a
car and can make it through the snipers, they can get someone to hospital where there are some, some, equipment, but not very much. I am now standing
in the office of an Italian NGO trying to rustle up some medical aid and we have boxes of surgical equipment which they desperately need in Fallujah.
They don't even have scalpels, few bandages, they don't even have anesthetics.