Nigeria’s President Goodluck Jonathan has visited the scene of last week’s carnage in which insurgents killed over 180 people.
A coordinated series of bomb blasts and shooting sprees, mostly targeting police stations, shattered the country’s second biggest city of Kano.
The attacks have been claimed by the Islamist sect Boko Haram which is loosely modelled on Afghanistan’s Taliban.
Explosions also struck two churches in Bauchi on Sunday, completely destroying one, but no casualties were reported.
Nigeria is split between Muslim and Christian communities. Boko Haram has gained a following as the Muslim north has become increasingly marginalised from the oil rich Christian south.
The president has been criticised for failing to grasp the gravity of the crisis and the worsening security problem has led some to question whether Nigeria isn’t sliding into civil war.