He added that because the passengers were sealed inside the vessel by bolts applied from the outside, “There’s no way to escape, even if you rise to the surface by yourself. You cannot get out of the sub without a crew on the outside letting you out.”

Wow.

Holy hell worst nightmare scenario….

We are exploring and mobilising all options to bring the crew back safely," it said on Monday. “Our entire focus is on the crewmembers in the submersible and their families.”

The company charges guests $250,000 (£195,270) for a place on its eight-day expedition to see the famous wreck.