Nnamdi Kanu, leader of the Indigenous People of Biafra, IPOB, has pleaded not guilty to some of the charges against him.
Kanu has pleaded not guilty to the seven terrorism charges against him by the Nigerian government.
The Nigerian government had re-prosecuted the pro-Biafra agitator on terrorism charges.
This was because the government recently amended the charges against him, raising them to seven counts compared to the five charges he previously faced and which bordered on crimes of treason and terrorism.
However, when the charges were read to him, Kanu pleaded not guilty.
Kanu was first released on bail by the Federal High Court led by Judge Binta Nyako in Abuja in 2017, but jumped out and fled the country.
However, he was arrested again in Kenya in July and repatriated to Nigeria to continue his trial.
Meanwhile, the Federal Superior Court is under strict security.