A search and rescue operation has been launched in the wake of the disappearance of a submarine that was used to transport visitors to the Titanic wreck in the Atlantic Ocean.
On Monday, the Boston Coastguard informed the BBC that a search operation was being conducted for the submersible.
It is unclear how many, if any, passengers were on board when it vanished.
This is a breaking news story, more to follow soon… Check back shortly for further updates.