Nigerian media mogul Raymond Dokpesi has lodged a lawsuit against the secret police over his arrest in connection with the Independence Day Abuja bombings.
Mr Dokpesi, election campaign chief to a rival of the president in elections due next year, wants 100m naira ($660,000; £410,000) in damages.
He was one of nine people arrested in Nigeria over the twin car-bombings which killed at least 12 people.
He says the arrest was "malicious".
Mr Dokpesi was freed at least nine hours after being detained on 4 October - three days after the bombing.
He owns the Africa Independent Television network, one of Nigeria's biggest, and is running the campaign of former military ruler Gen Ibrahim Babangida.
Gen Babangida is challenging President Goodluck Jonathan for the right to become Nigeria's governing party's presidential candidate.
On Monday, another candidate for the People's Democratic Party nomination - the former Vice-President Atiku Abubakar - called for an international inquiry into the 1 October bombings to ensure the investigations were not manipulated for political reasons.
BBC News
