Five Italian tourists died on a daring, deep-water scuba dive into an underwater cave in The Maldives — sparking a police investigation into the tragedy, authorities said Thursday.

Monica Montefalcone, a marine biology professor at the University of Genoa, and her 20-year-old daughter, Giorgia Sommacal, were 160 feet deep in the waters of Vaavu Atoll when they vanished Thursday, Italy’s foreign ministry said.

Three other adventure seekers on the trip — Muriel Oddenino of Turin, Gianluca Benedetti of Padua, and Federico Gualtieri of Borgomanero — also failed to resurface from the dive, according to the UK Sun.

Giorgia Sommacal was one of five Italian tourists who died on a scuba diving trip. Giorgia Sommacal / Instagram

Rescue crews rushed to the scuba hotspot, near the island of Alimatha, at around 1:45 p.m.…