NAIROBI, Kenya (AP) — The U.N. Security Council on Wednesday viewed “horrific pictures of corpses” from the scene of last week’s massacre in South Sudan and discussed taking actions that could include sanctions, diplomats said.

The U.N. has said hundreds of civilians were killed in the massacre last week in Bentiu, the capital of oil-producing Unity state. The top U.N. aid official in South Sudan, Toby Lanzer, has said “piles and piles” of bodies were left behind.