23-year-old woman from New Jersey has died on a flight from London to Newark Liberty International Airport, New Jersey.
The woman, who was travelling alone, passed away during a United Airlines flight from London Heathrow on Monday night.
The plane had taken off from Heathrow just before 6.45pm GMT (1.45 EST), and the young woman was found unconscious mid-air.
A doctor, who was on the flight, attended to the woman and tried to resuscitate her, but she was declared dead at 1.30am GMT (8.30pm EST).
Police and a medical examiner were waiting when Flight 115 landed at Newark Liberty International Airport at around 9:45pm EST.
The woman reportedly had pre-existing medical problems, Port Authority spokesman Joe Pentangelo told NorthJersey.com.
While her condition has not been revealed, it was not contagious and no other passengers were at risk a source told New Jersey.com.
No quarantine was enacted on the body or plane when it landed and the woman was pronounced dead on arrival.
Authorities are awaiting results of an autopsy and have not yet released her name.