Four suspected members of a radical Islamist sect have been charged with orchestrating a suicide bombing on United Nations headquarters in the Nigerian capital last month that killed at least 23 people.
They face the death penalty if found guilty.
The men were among 19 brought to a magistrates court in Abuja accused of carrying out separate attacks as members of Boko Haram, an Islamist group blamed for almost daily shootings and bombings in the remote northeast.
The group has shown its menace with a bombing in the police headquarters car park in Abuja in June and the UN strike.
The United Nations has confirmed 23 people dead and more than 100 wounded.
The defendants made no pleas because the court said the case was beyond its jurisdiction and ordered that it be sent to the Federal High Court for a hearing on 3 November.
