A devastating end to what started as an exciting exploration of the RMS Titanic. All five passengers aboard a submersible have been reported deceased in what the US Coast Guard describes as a catastrophic implosion. Underwater robots discovered the debris during the search found 1,600 feet from the bow of the Titanic which rests 2.5 miles below sea level.

Rear Adm. John Mauger, of the First Coast Guard District gave statements, “I know there are also a lot of questions about how, why and when did this happen. Those are questions we will collect as much information as we can about now.”

Those killed were Stockton Rush, the CEO of OceanGate Expeditions, the company that owned and operated the submersible; two members of a prominent Pakistani family, Shahzada Dawood and his son Suleman Dawood; British adventurer Hamish Harding; and Titanic expert Paul-Henri Nargeolet.