At least 11 people were killed in an explosion at a crowded market in Nigeria's capital Abuja late on Friday, medical and security sources said.
The blast occurred at Mami market, within the grounds of the Sani Abacha barracks, a busy area where people congregate to socialise.
"The scene has been cordoned off by security agents and an investigation has commenced," police spokesman Moshood Jimoh told Reuters.
A worker at the military medical centre in the barracks said at least 11 people had been killed and many more casualties were being taken to other hospitals in Abuja.
"Sixteen victims were brought into the hospital, four were dead but the other 12 are in a stable condition," Udofia Enefion, director general at Asokoro Hospital, said.
One witness said he was approaching the market to join New Year's Eve celebrations when he heard the blast.
"People ran in different directions. There were scores of bodies -- dead and wounded. They used army trucks to pack them away," Eric, a regular user of the market said.
The cause of the explosion was not yet known.
Nigeria was shaken by car bomb attacks in Abuja in October, for which responsibility claimed by a rebel group in the oil-producing Niger Delta, where there has also been a resurgence in violence this month.