Twenty-five people were killed when a Nigerian Air Force aircraft crashed into a swampy area in Ondo State during a routine flight from Benin City to Lagos, leaving recovery teams struggling through difficult terrain as investigators begin the search for answers over what brought the aircraft down.
The ATR-42 aircraft, identified by the Air Force as NAF 931, was carrying 20 passengers and five crew members when contact with it was lost at about 9:13 a.m. on Monday, October 5.
Repeated efforts to reach the aircraft by radio failed before its wreckage was located near the Nigerian Navy base in Igbokoda, headquarters of Ilaje Local Government Area.
The Nigerian Air Force has since confirmed that there were no survivors.
The crash has triggered three days of national mourning, a major search and recovery operation and a formal investigation into one of Nigeria’s deadliest military aviation accidents in recent years.
President Bola Tinubu ordered flags to be flown at half-mast across the country and directed the Nigerian Air Force to carry out a thorough investigation into the cause of the crash.
But two days after the accident, much of the aircraft remained trapped beneath water and mud, complicating efforts to recover the victims and crucial parts of the wreckage.
The location where the aircraft came down is heavily waterlogged and difficult for ordinary rescue vehicles and boats to reach.
Ondo State officials said the aircraft plunged deep into the swamp, with parts of the wreckage submerged.
The state government deployed two specialised swamp buggies to the area after conventional equipment was unable to reach the main wreckage.
The machines are designed to move across marshy and waterlogged terrain and are being used to create access for recovery teams.
The Nigerian Navy and Marine Police have also joined the search, alongside the Air Force, police, emergency agencies and local divers.
Movement around the crash site has been restricted as residents and sympathisers continue to gather in the area.
Authorities said fragments of the aircraft and human remains had been recovered, but the difficult terrain has slowed efforts to reach the main wreckage and recover all those on board.
Ondo State Commissioner for Environment Tob Loko said the aircraft appeared to have nosedived into the water and broken into sections, making it difficult for local divers to properly locate and access parts of it.
The condition of the crash site is likely to make recovery of the aircraft particularly important to the investigation, as investigators will need physical evidence from the wreckage to help establish what happened during the final moments of the flight.
The Nigerian Air Force has urged the public not to speculate about the cause.
So far, there has been no official finding of mechanical failure, pilot error, bad weather, sabotage or any other possible cause.
The aircraft had been travelling from Benin City to Lagos on what the Air Force described as a routine mission.
It was not reported to have been involved in a combat operation.
The ATR-42 used by the Nigerian Air Force is a twin-engine turboprop aircraft adapted for military purposes, including maritime patrol, intelligence, surveillance and reconnaissance missions.
Nigeria acquired specialised ATR-42 maritime patrol aircraft to help monitor its coastline and territorial waters, making the loss of NAF 931 significant beyond the immediate tragedy.
The aircraft was part of a small fleet used for surveillance and other operational support duties.
Questions will now be asked about its maintenance history, its condition before departure, communications between the crew and air traffic controllers and what happened in the minutes before contact was lost.
Another issue investigators may examine is whether the crew attempted to divert the aircraft away from populated areas.
Ondo State Health Commissioner Banji Ajaka said the crash occurred roughly 500 metres from the Nigerian Naval Forward Operating Base and suggested that the pilots may have steered away from the more populated parts of Igbokoda before impact.
That account has not been confirmed by the Nigerian Air Force or established by investigators, and it remains one of several questions surrounding the aircraft’s final moments.
Residents near the area described hearing a powerful sound around the time of the crash.
Some compared the impact to a thunder strike.
Such eyewitness accounts may help investigators reconstruct the sequence of events, but they do not establish whether there was an explosion or mechanical failure before impact.
The accident initially produced confusion over the number of people on board.
Early official information said the aircraft was carrying 32 people, made up of 25 passengers and seven crew members.
That figure appeared in statements from government officials, including the Presidency, and was widely reported during the first hours after the crash.
The Nigerian Air Force later reviewed the manifest and corrected the number to 25, comprising 20 passengers and five crew members.
All 25 were killed.
The five crew members were Squadron Leader M.I. Aburime, the flight captain; Squadron Leader A.P. Man-Ugwueje, a co-pilot; Flight Lieutenant I.S. Bako, also a co-pilot; Warrant Officer Abubakar A., an aircraft technician; and Corporal Uguru H.C., an aircraft technician.
The passenger list included officers and other military personnel, among them Flight Lieutenant T.L. Lazarus, Flight Lieutenant M. Akinloye, Flying Officer I.M. Adeshina, Master Warrant Officer Onwuka F., Master Warrant Officer Matini B.A., Warrant Officer Nuhu F.S., Flight Sergeant James R.B., Flight Sergeant Mohammed A.I., Sergeant Ani A.E., Sergeant Izibenikien S.I., Sergeant Alafuka C., Sergeant Mbadugha A.N., Lance Corporal Ugwuba F.C. and Lance Corporal Eledan G.E.
Six other passengers were listed by the Air Force without military ranks: Mrs Ezeh Nneka, Godstmine Tarabina, Joy Micheal, Sunday Micheal, Ukeme David and Gideon Omotola.
The Air Force has not publicly explained the status of those six passengers or why the entire group was travelling on the flight.
That remains one of the unanswered questions surrounding the mission.
Chief of the Air Staff Air Marshal Sunday Kelvin Aneke described the accident as a deeply painful moment for the Air Force and the country and said the service would support the families of those killed.
A condolence register has also been opened at Nigerian Air Force headquarters in Abuja.
President Tinubu described the crash as a painful loss for the Armed Forces and ordered an immediate investigation aimed at determining the cause and preventing a recurrence.
The national mourning and half-mast order reflect the scale of the tragedy, but attention is increasingly turning toward what investigators will eventually find.
Among the most important unanswered questions are why the aircraft suddenly lost communication, whether the crew transmitted any distress message, whether the aircraft developed a technical problem before impact and what its exact flight path showed in the moments before it crashed.
Investigators will also be expected to examine the aircraft’s recent maintenance and inspection records, weather conditions along the route, the crew’s actions, air traffic control communications and whatever evidence can be recovered from the wreckage.
The accident has also renewed wider concerns about military aviation safety in Nigeria.
The country’s armed forces have suffered a number of aircraft accidents in recent years involving different types of planes and helicopters.
One of the most prominent occurred in May 2021, when an aircraft carrying then Chief of Army Staff Lt. Gen. Ibrahim Attahiru crashed near Kaduna International Airport, killing him and other military officers.
Other military aircraft have been lost in training, operational and transport accidents since then.
The circumstances have varied considerably, and there is currently no evidence linking those earlier crashes to the accident in Ondo State.
Still, the loss of another military aircraft is likely to renew scrutiny of maintenance standards, ageing equipment, flight safety procedures and how recommendations from previous accident investigations have been implemented.
For families of those aboard NAF 931, however, the immediate concern remains the recovery of their loved ones.
The swamp around Igbokoda continues to make that process difficult.
Heavy machinery, divers and security personnel remain involved in the operation as authorities try to reach submerged sections of the aircraft and recover the victims.
The recovery may also prove crucial to answering the central question now facing investigators: how a routine military flight between two Nigerian cities ended with an aircraft carrying 25 people disappearing from radio contact and plunging into an Ondo swamp.
For now, that question remains unanswered.
