United Nations monitors who were trying to access the scene of "new massacres" in Syria's Hama province were shot at with small arms, U.N. Secretary-General Ban Ki-Moon told the U.N. General Assembly on Thursday morning.
Ban said he had just learned the information about the gunfire "a few minutes ago." He also called the reports of Wednesday's alleged Hama massacres "shocking and sickening."
Information about who shot at the monitors and when the shooting happened wasn't immediately available.
During his address to the U.N. General assembly, Ban also said that Syrian President Bashar al-Assad's government has lost "all legitimacy" amid reports of mounting violence.
Opposition activists accused forces loyal to al-Assad of killing 78 people in a tiny village in Hama province Wednesday.
Regime forces shelled Qubeir village before militias on foot used knives, guns and AK-47 rifles to kill residents, the opposition Local Coordination Committees of Syria said.
About 40 victims of the attack in Qubeir were buried in a mass grave Thursday, according to a youth activist whom CNN is not naming for safety reasons. Shabiha - or pro-government gangs - took other bodies to neighboring villages, the activist said. More than half of those killed were women and children, according to a local activist who evacuated bodies.
The Syrian government blamed a terrorist group for the massacre, saying it was timed to coincide with the U.N. meetings to make the regime look bad.
Maj. Gen. Robert Mood, head of the U.N. Supervision Mission in Syria, said observers heading to the village to verify reports of the killings had been blocked by soldiers and civilians. Residents are telling observers that they are at risk if they enter the village.
The observers have been monitoring adherence to Annan's six-point peace plan, which includes a cease-fire declared in April. But the effort has failed to halt the bloodshed in the nation.
International envoy Kofi Annan told the U.N. General Assembly on Thursday that his six-point peace plan for Syria is "not being implemented." He warned that more repression, abuse and even "all-out civil war" could occur if things don't change in Syria.
Two weeks ago, a massacre in Houla left more than 100 people dead, including women and children. Opposition activists blamed the deaths on government forces and allied militia, a claim that al-Assad denied.
CNN cannot independently confirm reports from within Syria because the government strictly limits access by foreign journalists.