Missing Titanic sub has 40 hours of breathable air left, says US Coast Guard – video

US Coast Guard officials have said the missing submersible Titan carrying five people has about 40 hours of breathable air left. Capt Jamie Frederick was addressing reporters in Boston on the third day of the search for the vessel and crew members that disappeared on Sunday on a dive to the wreck of the Titanic, 12,500ft below the surface of the Atlantic. He stressed that a complex search-and-rescue operation covering 7,600 sq miles - and involving US Coast Guard and US navy aircraft and vessels, as well as resources from the Canadian military - was under way but had so far not yielded any results

• Missing Titanic sub: latest updates