Stowaway death: ACSA tightens security at OR Tambo
One of the two men reportedly plunged to his death as they were clinging to the undercarriage of an aircraft.
JOHANNESBURG - The Airports Company of South Africa (Acsa) says it has tightened security at OR Tambo International Airport following the discovery of two stowaways on a British Airways flight.
The pair managed to fly from Johannesburg to London by clinging to the undercarriage of the aircraft.
One man reportedly plunged to his death while the other is in a serious condition at a London hospital under police guard.
They apparently had to withstand temperatures as low as 50 degrees below freezing point for 11 hours under the Boeing 747.
Acsa says while it is unclear how the two managed to get on the flight, it believes the matter is a security concern.
Acsa spokesperson Collin Naidoo said, "As Acsa we regret the loss of life associated with this tragic incident and due to this death security measures in and around the airport have been heightened."
WATCH: Stowaway found on London rooftop
POST-MORTEM TO BE CONDUCTED
British authorities said a post-mortem examination will be held in due course while inquiries are ongoing to establish the identity of a suspected stowaway who survived the 11 hour flight.
Authorities are hoping the suspect who survived will be able to provide insight into the reasons behind the drastic measure to leave South Africa.
Police have confirmed that they have been roped in to probe the allegations.
Naidoo said the incident is a tragedy.
"Acsa is working with police, British Airways and the authorities in London, as we fully investigate the matter."
LISTEN: The impossible story of stowaways.