Those killed were mostly women and children. No group has so far claimed responsibility for the attack on Sunday.

The U.N. human rights office in Geneva said that multiple sources reported that tens of civilians were shot dead on Monday.

"Journalists don't know the difference between an archbishop and a cardinal; they think Catholics worship Mary; they think the pope controls what every bishop and priest says and does."

Worshippers said construction of the building had been rushed.

"We are united in the blood of our martyrs," Pope Francis said.

“Violence is not the cure for our broken world,” the pope writes.