A teenager blew up himself as worshippers gathered for prayers in a mosque in northeastern Nigeria today, killing at least 50 people.
The attack struck Madina mosque in the Unguwar Shuwa area of Mubi, around 200km (125 miles) from the Adamawa state capital, Yola. It is thought to be the biggest mass killing in the country this year and is expected to be claimed by the Islamist militant group Boko Haram.
The area has faced an insurgency from the jihadists and the militants held territory in 2014, although they were pushed out of those areas by troops in early 2015.
Abubakar Othman, a police spokesperson in Adamawa state, said the death toll from the attack in the town of Mubi is 50 people, but 'there could be more as those seriously injured could add to the figure'.
Boko Haram typically mounts suicide attacks in crowded public places such as mosques and markets.
Tuesday's attack is the highest loss of life since 56 people were killed in the same state last December, when two schoolgirl suicide bombers killed 56 people and wounded dozens more in a coordinated attack on a crowded market.
Boko Haram has waged an insurgency in northeast Nigeria since 2009 in its attempt to create an Islamic state in the region, killing more than 20,000 and forcing around 2 million people to flee their homes.
Most attacks by the group focus on Borno state, the birthplace of the insurgency. The group held a swathe of land around the size of Belgium in Borno, Adamawa and Yobe states until early 2015 but were forced out by Nigeria's army backed by troops from neighbouring countries.
Additional reporting by Reuters.