Nigerian President Goodluck Jonathan vowed to track down the perpetrators of the bomb blasts that killed more than 100 people at the central mosque in the city of Kano.
Jonathan said his government will "continue to take every step to put an end to the reprehensible acts of all groups and persons involved in acts of terrorism."

More than 102 people were killed in the bomb explosions at the central mosque in Kano, said a hospital worker.
The multiple explosions that hit the mosque on Friday injured more than 150.
"Most of those receiving treatment ... are in dire need of blood and we are appealing to people to come and donate their blood to rescue the victims," Dr. Usman Bashir told Associated Press on Saturday.
Hundreds had gathered Friday in the mosque, which is known for attracting moderates, for a sermon in a region terrorized by attacks from the extremist group Boko Haram.
Witnesses said heavy smoke could be seen billowing in the sky from a long distance away. Immediately after the blasts, hundreds of angry youths took to the streets in riots, throwing stones, brandishing sticks and shouting at security officials.
The palace of the Emir of Kano is near the central mosque. The Emir, one of the highest ranking Islamic figures in Nigeria, is currently out of the country, said palace officials.
Boko Haram has not claimed responsibility, but the attack bears the hallmarks of the militant group that has carried out numerous such attacks in northern Nigeria, including in Kano. In September, two suicide bombers killed at least 15 students at a government college and in July, five suicide bombings were carried out over the course of a week. More than 1,500 have been killed this year in the insurgency, according to Amnesty International.
The attack was condemned by U.N. Secretary-General Ban Ki-moon who called the attack "horrific," pledged U.N. support for Nigeria's fight against terrorism, and called for the perpetrators to be swiftly brought to justice, according to his spokesman.