The five people on board the missing submersible close to the wreck of the Titanic have “about 40 hours of breathable air” left, the US Coastguard has said.

In an update on Tuesday, Captain Jamie Frederick said the search so far had not yielded any results.

The Coast Guard and other search and rescue crews have swarmed a remote area in the Atlantic in search of the vessel, called Titan, which went missing on Sunday with five people on board.

Rescuers are expanding their search into deeper waters.

It is understood from the vessel’s operator, OceanGate Expeditions, that Titan had a 96-hour oxygen supply in case of emergencies – meaning the people on board have around two days of “life support” left.

The five people on board are British billionaire Hamish Harding, Pakistani businessman Shahzada Dawood and his son Suleman, chief executive and founder of OceanGate Expeditions Stockton Rush, and French submersible pilot Paul-Henri Nargeolet.