At least 60 people are reported to have been killed in suicide bomb blasts in the north-east Nigerian town of Mubi.
The explosions happened in and around a mosque as Muslims were preparing for afternoon prayers.
No-one has yet said they were behind the bombings, but the Islamist militant group Boko Haram has launched previous attacks in Mubi.
Boko Haram has waged a campaign of violence since 2009 to try to create an Islamic state in northern Nigeria.
The violence has killed about 20,000 people and displaced more than two million.
State police commissioner Abdullahi Yerima said the first blast took place at the mosque at about 13:00 (12:00 GMT) and a second bomber detonated a device nearby as worshippers fled.