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U.S. Coast Guard investigating cause of Titan sub's implosion

The U.S. Coast Guard is investigating the cause of the undersea implosion of a tourist submersible that killed all five people aboard while diving to the century-old wreck of the Titanic, officials said on Sunday.

'Primary goal is to prevent a similar occurrence,' says group's chief investigator

A submersible is seen diving
The Titan submersible, operated by OceanGate Expeditions to explore the wreckage of the sunken Titanic off the coast of Newfoundland, dives in an undated photograph. (OceanGate Expeditions/Handout/Reuters)

The U.S. Coast Guard is investigating the cause of the undersea implosion of a tourist submersible that killed all five people aboard while diving to the century-old wreck of the Titanic, officials said on Sunday.

The announcement comes a day after Canada's Transportation Safety Board said it was conducting its own investigation into the implosion of the Titan, which has raised questions about the unregulated nature of such expeditions.

"My primary goal is to prevent a similar occurrence by making the necessary recommendations to enhance the safety of the maritime domain worldwide," Cpt. Jason Neubauer, the coast guard's chief investigator, said at a press conference in Boston.

The coast guard opened what it calls a marine board investigation on Friday, Neubauer said, and is working with the FBI to recover evidence, including a salvage operation at the debris site on the seabed about 490 metres from the bow of the Titanic wreck, about four kilometres below the surface.

WATCH | Mother of teenager killed on Titan says son 'really wanted to go': 

Mother gave her spot on the Titan submersible to her son

1 year ago
Duration 2:07
In an interview with BBC News, Christine Dawood says it was supposed to be her and her husband Shahzada that boarded the doomed Titan submersible, but instead, she gave the spot to her son Suleman because he really wanted to go.

The findings will be shared with the International Maritime Organization and other groups "to help improve the safety framework for submersible operations worldwide," Neubauer said.

He said the coast guard is in touch with the families of the five people killed, and that investigators are "taking all precautions on site if we are to encounter any human remains."