A bomb attack in the north-eastern Nigerian town of Maiduguri has killed at least 25 people and wounded dozens, officials say.
They say they believe the attack, which occurred in a beer garden, was carried out by the Islamic sect Boko Haram.
The group believes Muslims should withdraw from Western society.
It has claimed a number of bombings in north-eastern Nigeria, as well as an attack on police headquarters in the capital Abuja earlier this month.
Two men on motorcycles attacked a packed beer garden late on Sunday, officials said.
"The attackers believed to be Boko Haram members threw bombs and fired indiscriminate gun shots on a packed tavern at Dala Kabompi neighbourhood, killing at least 25 people and seriously injuring around 30 others," a police officer told the AFP news agency.
Eyewitnesses Emmanuel Okon told AFP: "I just heard a loud bang followed by sporadic shootings and plumes of black smoke filled the area with people screaming and running in all directions."
Boko Haram has recently carried out a wave of attacks targeting police, mainly in the north-eastern state of Borno.
Earlier this month, the group said it was behind the bombing of the national police headquarters in the capital, Abuja.
The group's trademark has been the use of gunmen on motorbikes.
Its leader Mohammed Yusuf and several hundred of his supporters were killed by security forces in Maiduguri in 2009 after the group attacked police stations.