A pair of explosions killed at least 24 worshippers at a mosque in Nigeria, with numerous victims caught in the second blast while trying to flee, police said.
Police in Adamawa state said they suspect the Islamist group Boko Haram of being behind the attacks.
The blast happened in the afternoon while worshippers were holding Zuhr prayer.
The blasts in the town of Mubi are believed to have been carried out by Boko Haram insurgents.
"Many people died on the spot and several others were taken to hospital with severe injuries", he said.
The violence has killed about 20,000 people and displaced more than two million.
Last Thursday, at least four people were killed when suicide bombers and fighters attempted to storm the Borno state capital, Maiduguri, raising fresh questions about security.
In recent months, Boko Haram's activities had been concentrated in the far north of the state around Madagali, near the boundary with Borno State.
On November 21, 2017 at least 50 people were killed when a suicide bomber blew himself up in a mosque during early morning prayers in the Unguwar Shuwa area of Mubi. "This is obviously the work of Boko Haram", he said.
Reports from Mubi indicated that the blasts hit the popular second hand clothes and the foreign exchange lines and mosque.
A bomb blast has occurred inside a mosque in Mubi, a town in Adamawa State.