The bandits also abducted one policeman in the process and took him to an unknown destination.
An eyewitness account said the gunmen broke into the buildings, took over the armory and freed detainees at the station.
The situation had caused serious panic in the area, as some families fled the community, while others scampered for safety.
The Police Spokesman in Imo, SP Orlando Ikeokwu confirmed the incident to NAN.
He said, “I can confirm an attack on Okigwe South Area Command Headquarters, Ehime- Mbano by yet to be identified gunmen.
“Five officers have been killed, while one is yet to be accounted for, but the building was not razed,” he said. (NAN)