A triple suicide bombing by Boko Haram jihadists killed 30 people in the northeastern Nigerian town of Konduga, emergency services said Monday.
Another 40 were injured in the attack in Konduga village in Borno State, the officials said.
Three bombers detonated their explosives outside a location where football fans were watching a match on TV on Sunday evening, they said.
There is a conflicting report about whether the blast occurred while people were watching football or a film.
Militant Islamist group Boko Haram is being blamed for the attack. There was no immediate comment from the group.
Formed in Borno State, the group has waged a brutal insurgency across the north-east for a decade.
Video halls are common across northern Nigeria. They are usually rudimentary buildings where people pay a small fee to watch football matches or films.
Boko Haram has targeted them on several occasions, saying they are unIslamic.
Konduga has been targeted before. In July 2018, eight people were killed after a suicide bomber detonated explosives in a mosque.
At least 27,000 lives have been lost and about two million people forced to flee their homes in the conflict with Boko Haram.
