'Banging' noises have been detected in the search for the missing submersible near the wreck of the Titanic.
The deep-sea vessel lost communication with tour operators on Sunday while about 435 miles south of St John’s, Newfoundland, during a voyage to the shipwreck off the coast of Canada. Titan has five people on board who now face a dwindling supply of oxygen, with the US Coast Guard estimating on Tuesday that the 6.7 metres (22ft) long OceanGate Expeditions vessel had just 40 hours left.
British billionaire adventurer Hamish Harding is on board, as well as Shahzada Dawood, his son Suleman and OceanGate’s chief executive and founder Stockton Rush, reportedly together with French submersible pilot Paul-Henry Nargeolet. The US Coast Guard on Wednesday morning said: "Canadian P-3 aircraft detected underwater noises in the search area.