US Coast Guard confirmed that rescue teams looking for missing Titanic submersible detected "Underwater noises" in search area where craft went missing two days earlier.

"Canadian P-3 aircraft detected underwater noises in search area. As result, ROV (remotely operated vehicle) operations were relocated in an attempt to explore origin of noises," US Coast Guard's First District said on its official Twitter page.

ROV searches "Have yielded negative results but continue," maritime military branch added. It was not immediately clear if news reports were based on same source.

One pilot and four passengers were inside miniature sub early on Sunday when it lost communication with parent ship on surface about an hour and 45 minutes into its two-hour dive.

Those aboard Titan for tourist expedition that costs $ 250,000 per person included British billionaire Hamish Harding, 58 and Pakistani-born businessman Shahzada Dawood, 48 with his 19-year-old son Suleman, who are both British citizens.

French explorer Paul-Henri Nargeolet 77 and Stockton Rush, founder and CEO of OceanGate Expeditions were also reported to be on board.