Canadian safety regulators open probe into fatal loss of Titan submersible

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 via REUTERS

(Reuters) - Canadian safety officials on Friday opened an investigation into the undersea implosion of a tourist submersible that killed all five people aboard while diving to the century-old wreck of the Titanic, raising questions about the unregulated nature of such expeditions.

A debris field from the submersible Titan was found at the bottom of the North Atlantic on Thursday by a robotic diving vehicle deployed from a Canadian search vessel, ending an intense five-day international rescue effort.