Gunmen on Thursday bombed the Ideato South Local Government Area Police Headquarters in Dikenafai, Imo State.
They freed the detainees.
The hoodlums, who came in large numbers, set part of the police station ablaze with explosive devices.
The explosives destroyed the administrative office, the Divisional Police Officer’s office, and the reception desk.
Chairman of Ideato South LGA Interim Management Committee, Bede Ikeaka, expressed shock at the incident.
Imo Police Command spokesman, Michael Abattam, a Chief Superintendent of Police, said he was yet to be briefed.
He promised to get back to our correspondent.
It was learnt that some of the detainees have been caught by a local vigilante group.