At least 50 people have been killed in a suicide bombing in the eastern Nigerian state of Adamawa, police say, the BBC reports.
A bomber struck inside a mosque packed with worshippers during morning prayers in the town of Mubi.
No-one has said they were behind the bombing but the Islamist militants Boko Haram typically target crowded places in northern Nigeria.
Some 20,000 people have been killed in Boko Haram’s eight-year insurgency.
At least 45 people were killed in a suicide bomb attack in the same state last December.
In that attack two female suicide bombers detonated their explosives in a busy market.