There are reports of a dual bomb attack on a crowded market in the northeastern Nigerian city of Maiduguri.
Local media are quoted as saying two explosions struck the marketplace causing a high number of casualties.
Last week 35 people were killed in bomb blasts at the same location.
The city is at the centre of an insurgency by Boko Haram Islamist militants.
Earlier suspected Islamist militants launched a dawn raid on Damaturu, the capital of Nigeria’s Yobe state.
They attacked a police station and tried to shoot down an air force jet.
Survivors of Friday’s bomb and gun attack on a mosque in Kano, the country’s second largest city, are recovering in hospital.
At least 100 people were killed.
Islamists from Boko Haram are suspected.
President Goodluck Jonathan, who has vowed to “leave no stone unturned” in hunting down the perpetrators, has asked the National Assembly to extend a state of emergency which expired on November 20.