Investigators in Belize say the three women from Massachusetts who died while on vacation had a build-up of fluids in their lungs. The three women from Revere, 23-year-old Kaoutar Naqqad, 24-year-old Imane Mallah,

The mayor of Revere, Massachusetts, said the three were members of the community there and expressed concern over the level of transparency from Belizean authorities.

Surveillance footage showed them entering their rooms Thursday night and not coming back out, police said in a statement.