Nigerian President Goodluck Jonathan vowed to track down the perpetrators of bomb blasts that killed more than 100 people at the central mosque in the city of Kano

Jonathan said that 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 blasts 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 said. Hundreds had gathered in the mosque for a sermon in a region terrorized by attacks by the Islamic extremist group Boko Haram. Witnesses said that 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. Boko Haram has not claimed responsibility, but the attack bears the hallmarks of the Islamic terrorist group that has carried out numerous such attacks in northern Nigeria, including in Kano. UN Secretary-General Ban Ki-moon called the attack "horrific" and pledged UN support for Nigeria's fight against terrorism.