(CNN) A stowaway fell from a plane flying over London and dropped into a residential garden on Sunday, just feet from a sunbathing man, according to reports.

The body was traced to the undercarriage of Kenya Airways flight KQ 100 that left from Nairobi's Jomo Kenyatta International Airport, Kenya Airports Authority said in a statement Tuesday, adding that it is investigating the incident.

London's Metropolitan Police said Monday that the victim appeared to have fallen from the landing gear compartment as the plane approached London's Heathrow Airport.

One neighbor described hearing a "whomp" as the body hit the ground, the UK's Press Association (PA) news agency reported.

"He had all of his clothes on and everything. I had a closer look and saw there was blood all over the walls of the garden," the neighbor told PA.

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