Suicide bombers kill dozens at two northeast Nigerian mosques

Two suicide bombers struck at mosques in northeast Nigeria on Friday, killing at least 42 people and wounding more than 100, an official and witnesses said.

A massive blast in Yola, the capital of Adamawa state, killed 27 people and wounded 96 during Friday afternoon prayers that were crowded with officials helping to inaugurate a new mosque, said Saad Bello of the National Emergency Management Agency.

Radio stations broadcast urgent appeals for blood donations. "We call on individuals to come and donate blood to save lives," Bello said.

In an earlier attack before dawn on Friday, another suicide bomber killed 15 people in an explosion at a mosque in Maiduguri, the biggest city in the northeast and birthplace of the Boko Haram armed group, according to a self-defense fighter who helped remove the bodies. He spoke to the Associated Press on condition of anonymity for fear of reprisals.

The fighter said there appeared to be only one suicide bomber although "we all heard two explosions" around 5 a.m. in the mosque in the Jiddari Polo area of Maiduguri.

There was no immediate claim of responsibility for either suicide bombing.

Friday's attacks, however, were the latest in a string of assaults blamed on Boko Haram who have been indiscriminately killing Christians and Muslims they accuse of not following their version of Shariah law.

Boko Haram has pledged allegiance to the Islamic State in Iraq and the Levant (ISIL) group and wants to recreate an Islamic caliphate over a swath of West Africa that sprawls across Nigeria's border into neighboring Chad, Cameroon and Niger.

Suicide bombers in all four countries have killed hundreds in recent months. The six-year-old uprising has left an estimated 20,000 people dead and forced 2.3 million from their homes.

A promised offensive by a multinational army of troops from Nigeria and its neighbors has been delayed for months without explanation.