United Nations observers visited the village of Treimsa Saturday (July 14th), where an estimated 150 people were killed Thursday, AFP reported.

Sausan Ghosheh, spokeswoman for the UN, confirmed that a group of observers had entered Treimsa.

"We were informed yesterday that there was a ceasefire," she said. "We sent a patrol to Treimsa on a reconnaissance mission. The patrol assessed the situation to see if there was in fact a ceasefire."

Officials from around the world denounced the killings.

"This reprehensible crime, which we strongly condemn, should be an additional incentive for everyone to abandon the methods of violence, murder, revenge and terrorism in solving problems," Iraqi Prime Minister Nouri al-Maliki said in a statement Saturday.

On Friday, Abdul Latif al-Zayani, the secretary-general of the Gulf Co-operation Council, called for a full investigation into the incident.

Thursday's killings were "a savage, terrorist act contrary to the precepts of Islam", al-Zayani said.

Hundreds of soldiers supported by helicopters attacked Kirbet Ghazaleh in Deraa province on Saturday, the Syrian Observatory for Human Rights reported.

A pregnant woman was among at least 28 people killed nationwide Saturday, according to the Observatory.