UK police investigate whether man found dead was stowaway on BA flight

A general view of the NotOnTheHighStreet.com offices on Kew Road, south west London, Friday, June 19, 2015, after a stowaway plunged to his death from a plane and landed on the shop. A man is in critical condition in a London hospital after he was found stowed away in the undercarriage of a plane that had just completed a 10-hour flight, and police are investigating whether a man found dead on a west London rooftop had fallen from the same plane. (Sally Wardle/PA via AP) UNITED KINGDOM OUT - NO SALES - NO ARCHIVES (The Associated Press)

British police say they are investigating the possibility that a man found dead on a roof in west London had been a stowaway on a flight that was on approach to Heathrow Airport.

Authorities say they found a second man in the undercarriage of a plane from Johannesburg after it landed. The second person, who is between 25 and 30, was taken to a west London hospital and is in serious condition. Police say there is no evidence to link the two, but that it is a line of inquiry.

Police say the first man was found Thursday on a roof in Richmond, which is below the flight path.

British Airways said Friday it is working with police in London and Johannesburg to establish the facts in this "rare case."