The amateur footage shows the ship in heavy seas before a monster surge strikes the side of the vessel.

Smashed glass, debris and seawater flood into the public lounge in the Louis Majesty, causing chaos.

The accident left two tourists dead, injured 14 and forced the liner to dock in Barcelona for repairs.

Most of the 1,300 tourists on board have asked to end their cruise holidays early and head back to their home countries following the tragedy.

A German woman passenger said: "It was a monster wave... it smashed all the windows. Everything happened so quickly."

Images filmed by a passenger showed screaming people fleeing, as a wall of water crashed through a window and then swept into a lounge area, knocking over furniture.

"We didn't know what was happening, if there were dead or injured, only that we were going back to Barcelona," an Italian passenger said.

One 64-year-old woman was in "very serious" condition, a spokeswoman at Barcelona's Vall d'Hebron Hospital said.

Spanish media said the woman's legs were broken in the accident. A 59-year-old man was also taken to hospital with multiple injuries.

Louis Cruise spokesman Michalis Maratheftis said there would be no investigation.

"This was a natural, unforeseen and unpredictable phenomenon because we are talking about three big waves, higher than eight metres, striking the vessel," he said.

"This is not an incident which we could have prevented, therefore there will be no investigation."