A British Airways engineer has died after two vehicles collided on the airfield at Heathrow Airport this morning.
The victim, in his 40s, went into cardiac arrest following the crash on the Tarmac near Terminal Five just after 6am. Paramedics tried to resuscitate him both at the scene and on the way to hospital but he later died.
Another driver, who was treated at the scene, suffered a suspected broken shoulder.
Hundreds of passengers were evacuated from a plane following the incident between two operational vehicles, with thousands more experiencing delays of up to two hours as the disruption affected more than 25 flights.
Scotland Yard said there had been no arrests, but the Health and Safety Executive had been informed.
One of the two vehicles involved in the accident at London Heathrow this morning is pictured
Police stand around an airport vehicle on the Tarmac at London Heathrow this morning
Scotland Yard officers were called to London Heathrow Airport at 6am today after the incident
The emergency services went to the scene just after 6am following reports of the collision
A BA spokesman said: 'We are deeply saddened by this tragic incident and are offering our full care and support to his family and colleagues.'
The victim's colleague Kevin Fitzgibbon, of Wokingham, Berkshire, tweeted: 'Sad day at work today. Lost one of our engineering colleagues this morning.
'Sadly passed away after a vehicle collision on the ramp T5 Heathrow. My thoughts are with his family and friends at this terrible time.'
Another Twitter user called 'JetFixerUK' added: 'Can't say anything, except for I knew this guy. RIP my friend. Gone way too soon.'
Passenger Alastair MacLeod told Mirror Online: 'I was boarding through B48 at around 6.40am. There was a visible incident of some kind of a stand outside the window by the boarding gate.
The crash forced passengers to leave a plane. Airport Webcams tweeted this picture today
One of the vehicles involved in the crash at Heathrow Airport where the man in his 40s died
Police and airside operations vehicles at Heathrow Airport where the man died in the crash
Two airport vehicles crashed on the airfield at London Heathrow, including the one pictured
Passengers were told to leave an aircraft which was unable to take off because of the incident
'I spoke to the BA staff on the desk who were also curious but uninformed.
'We boarded, waited, and then the captain gave a series of apologies and further delay announcements.
'At around 8.55am we all deplaned and I'm now back in the terminal waiting to see what happens next.'
Another passenger who had been on a Zurich-bound flight told Sun Online: 'We boarded and waited and then the captain gave a series of apologies and further delay announcements.
'It looks like some airport or airline staff may have been injured and police required an area to be closed off which prevented some planes from leaving their gates.'
One of the vehicles involved in a crash at Heathrow Airport is removed from the scene today
One of the two airport vehicles which crashed on the airfield is taken away on a truck
The accident happened on the taxiway near Terminal Five at the airport in South West London
Officers from the Metropolitan Police's serious collision investigation unit went to the scene
At least 25 flights from Terminal Five were delayed by the incident at Heathrow this morning
'The gate was surrounded by various airport service vehicles including two fire engines. There were blue lights everywhere.'
A police spokesman said: 'Police were called at 6.06am on Wednesday following a collision between two airport vehicles on the taxiway at Heathrow Airport.
'Officers attended with London Ambulance Service colleagues. One male is believed to have sustained a broken shoulder; his injuries are not life-threatening or life-changing.
'Another male, aged in his 40s, was taken to a west London hospital with serious injuries. He has since died. Officers have informed next of kin.
The two vehicles involved in a crash (front left and front right, after they have been moved)
The wreckage of one of the vehicles sits outside Terminal 5 at London Heathrow today
The incident happened near Terminal Five at London Heathrow Airport today (file picture)
Passengers reported delays of up to two hours to more than 25 flights after the crash
The crash between two vehicles happened before sunrise at London Heathrow this morning
'We await formal identification. A post-mortem will be scheduled in due course. There have been no arrests.
'The Health and Safety Executive has been informed. Officers from the Met's serious collision investigation unit are investigating.'
A London Ambulance Service spokesman said: 'We were called at 6.03am today to Heathrow Airport, to reports of a road traffic collision.
'We sent an incident response officer, an advanced paramedic, a cycle responder and three ambulance crews.
'We treated two patients – both men. One was treated for a shoulder injury and taken to hospital.
'The second later went into cardiac arrest and extensive efforts were made to resuscitate him both at the scene and on the way to hospital.'
Heathrow tweeted shortly after 8.30am that it was investigating the incident, which did not involve any passengers and was not expected to impact journeys.
A spokesman later told MailOnline: 'We can confirm that following a serious accident involving two vehicles on our airfield, an airport colleague has passed away.
'Our deepest condolences go to the family and friends affected by this accident. We will be fully cooperating with the police in the investigation which will follow.'
A BA spokesman added: 'We have apologised to customers for the delay to a small number of our flights this morning, following an incident involving two operational vehicles at the airport.
'We are doing all we can to ensure they will be able to depart as soon as possible.'
* Did you witness the crash? Please email: firstname.lastname@example.org *