Annan 'appalled' by reported killings UN-Arab league envoy Kofi Annan in Tehran, Iran on July 10,2012. As the UN-Arab League joint special envoy on Syria, Annan has repeatedly emphasized that Iran should be "part of the solution" to the Syrian crisis. Reports 220 people were killed in the village come from anti-government activists, The Guardian reported. Gen. Robert Mood, head of the U.N. monitoring mission, confirmed heavy artillery, tanks and helicopters were in the village. Also Friday, Syrian media reported a large explosion in Damascus, possibly from a car bomb, CNN said. Annan, special envoy for the United Nations and Arab League, said he was "shocked and appalled" by the reports from Tremseh. He said the government of President Bashar Assad has violated its "undertaking to cease the use of heavy weapons in population centers and its commitment to the six-point plan." Amnesty International said the Syrian government must allow U.N. monitors access to all parts of the country. The group also called on the United Nations to strengthen its Syrian mission. "U.N. human rights monitors should have a rapid reaction capability to investigate specific incidents and a permanent presence in cities outside Damascus," said Ann Harrison, deputy director for North Africa and the Middle East. Tremseh was attacked Thursday. Survivors and activists said gunmen went from house to house in Tremseh to execute some people and others were fatally shot as they tried to flee the village in Hama province, Britain's Daily Telegraph reported Friday. The Tremseh operation began when the army barricaded roads into the village, then began its assault using tanks, mortars and helicopter gunships, activists said. Annan's six-point peace plan has been ignored despite repeated pleas by Annan to abide by it. The Syrian Network for Human Rights and the Damascus Center for Human Rights Studies said they documented 109 deaths across Syria Friday.