Officials in Nigeria say a bomb has exploded at a popular market inside an army barracks in the capital, Abuja.
Nigerian television is reporting that at least 30 people died in the explosion. Police have not confirmed that figure.
Officials say the bomb went off inside Mammy market where people were eating and drinking to celebrate New Year's Eve.
No one has claimed responsibility for the attack.
Nigerian President Goodluck Jonathan blamed the bombing on the radical Islamist group Boko Haram.
The group claimed responsibility for Christmas Eve bomb attacks in the central city of Jos, and for attacking several churches in the northern city of Maiduguri. More than 80 people died in those attacks.
Abuja was shaken by car bomb attacks in October. Militants from the southern oil-producing Niger Delta claimed responsibility for those blasts.