Updated

An explosion rocked a shopping mall in Nigeria's capital, Abuja, and witnesses say at least eight people have been killed.

They said body parts are scattered around the exit to Emab Plaza.

The explosion is the latest of a series of violent attacks suspected to be by Islamic extremists. Nigerian security forces appear incapable of curtailing the near-daily attacks by extremists in the northeast.

Two separate explosions in April killed some 120 people in Abuja. Both were claimed by Boko Haram Islamic extremists who threatened further attacks.

A bomb at a medical college in northern Kano killed at least eight people Monday.

Boko Haram attracted international condemnation for the April mass abductions of more than 200 schoolgirls, and is blamed for this week's abductions of another 90 people.