LA PALMA, Canary Islands (AP) — A lifeboat from a British-operated cruise ship fell upside down into the sea at port in Spain's Canary Islands during a safety drill, killing five crew members and injuring three others Sunday, officials said. About 1,400 passengers were on board, but none were involved in the accident.

Thomson Cruises confirmed the incident involving the Thomson Majesty ship on the island of La Palma, saying "there have sadly been five crew fatalities and three crew injuries." One of the three injured was discharged from a hospital, and the other two were also expected to be allowed to leave the medical facility.

Investigators were trying to determine what caused the lifeboat to plummet into the water.