Summary
More noises have been heard in the search for the missing Titanic sub, the US Coast Guard says.
Capt Jamie Frederick says they still do not know what the noises are - but teams are looking in that area.
The search is being expanded - the surface search is now twice the size of the US state of Connecticut and the sub-surface search is 2.5 miles deep.
Capt Frederick also tells reporters it is still a search and rescue operation, adding: "We have to remain optimistic and hopeful".
The crew are thought to have less than 20 hours of oxygen left, based on a previous estimate.
Contact with the sub - which has five people on board - was lost on Sunday as it made a descent to the Titanic wreck.
Source: BBC
BDST: 0903 HRS, JUNE 22, 2023
SMS