A search and rescue mission is underway off the coast of Newfoundland for a missing submersible that takes tourists to see the wreckage of the Titanic, according to news reports on Monday.  

The U.S. Coast Guard in Boston told the BBC that it is spearheading the operation off the Canadian coast to locate the missing submersible.

The company that owns the vessel, OceanGate Expeditions, confirmed to the outlet that it was missing.  

“We are exploring and mobilising all options to bring the crew back safely,” OceanGate said in a statement to BBC News. “Our entire focus is on the crewmembers in the submersible and their families.” 

Neither the Boston U.S. Coast Guard nor OceanGate responded to The Hill’s request for comment.  

According to its website, OceanGate charters submersibles for deep sea explorations and had recently announced that its Titanic expedition was going to be launched in June.

“The wreck of the Titanic lies about 400 miles off the coast of Newfoundland. Without any cell towers in the middle of the ocean, we are relying on @Starlink to provide the communications we require throughout this year’s 2023 Titanic Expedition,” the company tweeted on June 14.  

The submersible is capable of carrying five passengers and has “life support” for 96 hours for a five-person crew.

The RMS Titanic, then the largest ship afloat, hit an iceberg and sank in 1912 on its maiden voyage, killing more than 1,500 people.