BEIRUT, Lebanon — The United Nations Security Council on Sunday unanimously condemned the Syrian government for its role in the massacre of at least 108 villagers, with new details emerging from international observers that appeared to prompt rare Russian cooperation in criticizing its ally in Damascus.

The 15-member Council approved a statement that, while not blaming the Syrian government directly for all the deaths, rebuked it for its use of tanks and artillery against civilians despite agreeing to an April 12 cease-fire.

“The evidence is clear — it is not murky,” Peter Wittig, the German envoy, told reporters after the emergency meeting. “There is a clear government footprint in those killings.”

Syrian government actions not only violate the cease-fire engineered under United Nations auspices, he said, but also jeopardize any effort at peace.