The crew of a recreational submarine that sank off the Egyptian Red Sea coast killing six Russian tourists and injuring nine other passengers have been questioned by authorities in Egypt amid an ongoing investigation.

A recreational submarine taking 45 tourists on an underwater cruise of coral reefs sank off the Egyptian Red Sea resort town of Hurghada, leaving six people dead.

Egyptian officials say a submarine tourist vessel with 45 passengers and 5 crew sank off the country's popular Red Sea coast, killing at least six people.