At least 30 people have killed in a suicide bomb attack in the north-eastern Nigerian town of Madagali, the army says.
Two female suicide bombers detonated their explosives in a busy market, an army spokesman told AFP news agency.
No group has said it was behind the attack.
But Islamist militant group Boko Haram has been waging a six-year insurgency against the government and often uses suicide bombers.
Dozens of others were wounded in the attack, army spokesman Major Badare Akintoye told AFP.
Boko Haram occupied the town for several months until it was retaken by the military last year.