Underwater sounds heard in search for sub

1. The US Coast Guard has confirmed that a Canadian P-3 aircraft detected "underwater noises" in a search area for the missing Titanic sub
2. US media, citing internal US government memos, described them as "banging sounds"
3. It is unclear when and how long the banging lasted, according to Rolling Stone and CNN
4. Contact with the miniature sub which has five people on board was lost on Sunday as it made a 3,800m descent to the Titanic wreck off the coast of Newfoundland, Canada
5. Search authorities estimate the vessel has less than 30 hours of oxygen left
6. British-Pakistani businessman Shahzada Dawood and his son Suleman are on board, along with British billionaire explorer Hamish Harding
7. Paul-Henry Nargeolet, a former French Navy diver who has explored the Titanic before, is also on the vessel, as is Stockton Rush, chief executive of OceanGate - the firm behind the dive

Hello and welcome

Welcome to our live coverage as a search operation is under way for a tourist submarine which has gone missing off the coast of Newfoundland in Canada, during a trip to view the wreck of the Titanic.

We're not sure how many people are on board - but the operating company says it is focusing all of its efforts on bringing crew members back to safety.

We'll keep you updated as and when we learn more.