A submarine which takes tourists to see the wreck of the Titanic has gone missing in the Atlantic Ocean, sparking a widespread search and rescue mission, reports the BBC.
It's currently unknown how many people were on board the submarine at the time.
Paying tourists can take small trips in submarines to see the sunken ship, which sits 12,500ft below the surface of the Atlantic - around 370 miles from the coast of Canada's Newfoundland. Following its discovery in 1985, the wreckage has been intensively explored by divers and submariners.
