Federal judge, Justice Binta Nyako has denied bail to the Pro-Biafra leader, Nnamdi Kanu, who is accused of treason. Mr Kanu, who leads the Indigenous People of Biafra (IPOB), has been held in detention without trial since October 2015.
Three other activists, who had also been campaigning for the creation of the state of Biafra were denied bail.
Justice Nyako said she had denied bail to the suspects as they were charged with serious offences, but said trial proceedings should be expedited.
He was initially acquitted on some charges but the secret police refused to release him and then pressed further charges.