Hoodlums on Monday burnt the Amandugba Divisional Police Headquarters in Isu Local Government Area of Imo.
This has increased to four, the number of police facilities razed in the state in less than one week.
The attackers on arrival were said to have thrown inflammable substances at the police facility.
“Fire has engulfed the entire facility Amandugba Divisional Police Headquarters. The attackers threw explosives devices and it caught fire immediately,” an eyewitness said.
Three police facilities were earlier razed at Atta, Izombe and Orji.
Courts were also torched at Atta and a Health Centre was razed in Njaba LGA.
The fresh attack came just 24 hours after a former presidential aide, Ahmed Gulak, was killed in the state.
Gulak, who was on his way to the Sam Mbakwe International Cargo airport in Owerri for a flight to Abuja, was gunned down.
Also a senior officer with the Nigerian Immigration service, Okiemute Mrere, was shot dead along the Owerri- Port Harcourt Road- Owerri on Saturday night.
Police Spokesperson in Imo state, Bala Elkana, said he had not been briefed on the latest attack when he was contacted on phone.