Abuja: Authorities say four men charged over a deadly bombing at Nigeria`s United Nations headquarters could face the death penalty over the attack that killed 23 people.
The August 26 car bombing also wounded 116 people.
Charges were filed on Friday in Abuja magistrate court.
The suicide blast was claimed by a radical Muslim sect in Nigeria known locally as Boko Haram.
The attack launched far from the group`s base in the country`s northeast represented a major escalation in violence. Officials also fear the shadowy group now has ties to al-Qaeda-linked terror organisations elsewhere in Africa.