A Nigerian Air Force G22 aircraft carrying more than 30 National Emergency Management Agency workers crashed Friday at Port Harcourt International Airport during a mock rescue exercise, injuring two people, police said.

The incident occurred just off the runway after landing at 12:13 p.m. (6:13 a.m. ET) , Port Harcourt police spokeswoman Rita Inoma-Abbey said in a written statement Saturday.

The aircraft was "severely damaged," she said. No further details were available about the crash in the oil-rich Niger Delta city of Port Harcourt.