Bomb attack kills at least 24 at Nigerian mosque

May 1 (UPI) — Suicide bombers killed at least 24 people when they detonated explosives as Muslims were preparing for afternoon prayers Tuesday at a mosque in Mubi, Nigeria.

The bombers were positioned in different locations around the mosque when they launched the attack. As worshippers fled the scene towards a market, a second suicide bomber also detonated his device, killing 20 people, Othman Abubakar, a spokesman for the Adamawa State police, told CNN.

“The first bomber went into the mosque while they were praying and detonated his explosives killing four people,” Abubakar said.

A witness to the bombing, Abdullahi Labaran, said the first bomber mingled with worshippers in the mosque before detonating his explosives.

Many were injured and the death toll is expected to rise.

No group has claimed responsibility for the attack yet.

The attack comes as Nigerian President Muhammadu Buhari visited Washington on Monday to meet with U.S. President Donald Trump.

Trump said some African countries were “very tough places to live in” and said he was moved by stories of Chibok schoolgirls who were rescued after being kidnapped by Boko Haram in Nigeria.