A stowaway has been found dead inside a British Airways jumbo jet after it touched down at Heathrow early on Thursday.
The body of the man was discovered in the landing gear bay of the Boeing 747 after a 6,000-mile flight from Cape Town, BA said.
Police said the man was not a passenger or a member of the crew on the flight from South Africa's second busiest airport.
Authorities in South Africa said a man was spotted jumping a fence at the transport hub before running towards a BA flight as it waited to take off last night. Security staff gave chase but backed off for safety reasons and a subsequent search of the airport failed to find the man.
Airports Company South Africa, which runs the airport, said it was carrying out an investigation.
A spokeswoman said: "A search of the airfield was immediately conducted but the person was not found. British Airways, in addition to various other parties, were notified. Further sweeps were conducted of the runway and the broader airfield."
The Metropolitan Police said they were called to the scene at 6.25am along with paramedics and the man was confirmed dead at shortly after 7am.
"The death is being treated as non-suspicious," a spokesman said. "Inquiries are ongoing to establish the man's identity."
British Airways confirmed the body was found inside the landing gear bay of a Boeing 747, which can carry 345 passengers and has a top speed of 614mph. They can fly at heights of up to 45,000ft.
A company spokesman said: "We are liaising with the South African authorities and Cape Town airport after a body was found in the landing gear bay of one of our aircraft. This is a very rare and sad event and our thoughts are with the individual's family."