A security official says five suspects are now being held over car bombings that struck Nigeria during a celebration of its 50th anniversary of independence.
State Security Service spokeswoman Marilyn Ogar told reporters Tuesday that Charles Okah, the brother of jailed former militant leader Henry Okah, and the four others will be charged in court over the attack. Ogar says security officials also know the cars used were wired with explosives in Port Harcourt and driven to Abuja.
The bombings killed at least 12 people and wounded dozens more in Abuja, Nigeria's capital. The main militant group in the country's oil-rich southern delta claimed responsibility for the attack.
Henry Okah faces terrorism charges in South Africa, where he lives, over the attack.