At least 50 people were killed and hundreds were injured in a mosque bombing in northeastern Nigeria early on Tuesday.

Police spokesman Othman Abubakar said that the young man detonated his explosives while mingling among the worshippers, according to the Associated Press.

People were arriving at the mosque in Adamawa for morning prayers when the bomb exploded.

While there was no immediate claim of responsibility, suspicion immediately fell on Islamist insurgents Boko Haram.

Boko Haram held territory in Adamawa in 2014 but they were pushed out by Nigeria's army backed by troops from neighbouring countries in early 2015.