Missing Titan sub has 40 hours of air left as search yields no results

Rescue teams race to find crew of the submersible Titan, which went missing during a dive to the wreck of the Titanic

• Missing Titanic sub - latest updates

US Coast Guard officials said on Tuesday afternoon that the crew of the submersible Titan, which went missing in the Atlantic during a dive to the wreck of the Titanic, had about 40 hours of breathable air remaining, if they are still alive.

Capt Jamie Frederick also told reporters at a media briefing that a massive sea and air search that began on Sunday night for the vessel and five men aboard, and which has so far covered 7,600 sq miles of a remote area of the ocean, had not yielded any results".