The U.S. Coast Guard said Sunday it is leading an investigation into the loss of the Titan submersible that was carrying five people to the Titanic, to determine what caused it to implode. Capt. Jason Neubauer, chief investigator, said the salvage operations from the sea floor are ongoing, and they have mapped the accident site. He did not give a timeline for the investigation. The convening of a Marine Board of Investigation is the highest level of investigation conducted by the U.S. Coast Guard, Neubauer said. Investigators are working closely with other national and international investigative authorities, including the U.S. National Transportation Safety Board, Transportation Safety Board of Canada, the French marine casualties investigation board and the United Kingdom Marine Accident Investigation Branch, Neubauer added. Evidence is being collected in the port of St. John's, Newfoundland, in coordination with Canadian authorities. For more: https://www.wtsp.com/article/news/nation-world/titan-sub-implosion-investigation-us-coast-guard/507-d03f79c1-b30f-4c79-9a34-5e4f794fa63d ►Subscribe: https://on.wtsp.com/youtube ►Website: https://www.wtsp.com/ ►Facebook: https://facebook.com/10TampaBay ►Twitter: https://twitter.com/10TampaBay