Four scuba divers drowned after a routine trip to a popular underwater cave system in southern Italy went horribly wrong over the weekend, according to the coast guard.

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Four scuba divers drowned after a routine trip to a popular underwater cave system in southern Italy went horribly wrong over the weekend, according to the coast guard.

Four scuba divers drowned after a routine trip to a popular underwater cave system in southern Italy went horribly wrong over the weekend, according to the coast guard.

Four scuba divers drowned after a routine trip to a popular underwater cave system in southern Italy went horribly wrong over the weekend, according to the coast guard. CNN values your feedback 1.