LONDON (USA TODAY) - Written by Kim Hjelmgaard
A British Airways passenger plane has made an emergency landing at Heathrow Airport, prompting the closure of both runways, the airport said on Friday.
All passengers from the plane have been safely evacuated.
"It is not being treated as a terrorist incident," London's Metropolitan Police said.
One unconfirmed theory is that the plane's engines were struck by a bird.
Some eyewitnesses reported seeing flames from the plane as it flew over London, according to Sky News.
Flight BA672 was en route to Oslo from London, but turned back "due to a technical fault," British Airways said.
The carrier said that it would fully investigate the incident.
Heathrow's southern runway re-opened for traffic shortly afterward, followed several hours later by the opening of the second runway.
Seventy-five passengers were aboard the Airbus A319 aircraft and three people have been treated for minor injuries.
The U.K. hub is Europe's busiest airport.