Three U.S. tourists who were found dead in a hotel room in Belize last month reportedly died from carbon monoxide poisoning.

Three American women who were discovered dead in a Belize resort hotel room last month died from carbon monoxide poisoning, their families said. A joint statement this week from their families cites the U.S. Embassy in Belize and says the women died from "acute carbon monoxide poisoning, likely caused by a faulty instant water heater."

The three women from Massachusetts who were on vacation in Belize died of carbon monoxide poisoning, officials confirmed Wednesday.