UN rights spokesman Rupert Colville has said it is "clear" that the Syrian government was involved in shelling the town of Houla, but this resulted in relatively few deaths.
He said that the majority of deaths "appear to have been the result of house-to-house summary executions" by the pro-government Shabbiya militia.
An air strike by a Syrian plane in the northern rebel-held town of Azaz killed 30 people and wounded scores of others, a local doctor said.
The UN Special Envoy to Syria Kofi Annan has admitted he is "frustrated and impatient" over the continued violence and killing in Syria.
So after weeks of insisting his peace mission is the only game in town, it might be that Kofi Annan is preparing to pack up and leave.