FILE - This undated image provided by OceanGate Expeditions in June 2021 shows the company's Titan submersible. Rescuers are racing against time to find the missing submersible carrying five people, who were reported overdue Sunday night. Associated Press

The U.S. Coast Guard says a missing submersible imploded near the wreckage of the Titanic, killing all five people on board.

Coast Guard officials said during a news conference Thursday that they've notified the families of the crew of the Titan, which has been missing for several days. Debris found during the search for the vessel “is consistent with a catastrophic implosion of the vessel,” said Rear Adm. John Mauger of the First Coast Guard District.

“The outpouring of support in this highly complex search operation has been great appreciated. Our most heartfelt condolences go out to the friends and loved ones of the crew,” Mauger said.

OceanGate Expeditions said in a statement that all five people on board, including company CEO Stockton Rush, are believed to be dead. Rush, Shahzada Dawood and his son Suleman Dawood, Hamish Harding, and Paul-Henri Nargeolet “have sadly been lost,” OceanGate said in a statement.