LONDON: A man died after two vehicles collided on the airfield at London's Heathrow Airport, Europe's biggest hub, police said on Wednesday. 'One male, is believed to have sustained a broken shoulder; his injuries are not life-threatening or life-changing,' the Metropolitan Police said in a statement. 'Another male, aged in his 40s, was taken to a west London hospital with serious injuries. He has since died.' Some passengers had to disembark from a plane due to the incident, a spokeswoman for the airport said. 'We will be fully cooperating with the police in the investigation which will follow,' Heathrow said in a statement. The airport was not closed as a result of the accident.