Friends say a birthday celebration trip turned into a horrible tragedy when the three lifelong friends were found dead inside their hotel resort room in Belize.

The cause of death for each of the three Revere women who were found dead in their Belize hotel room has been announced by officials to be an “acute pulmonary edema,” a buildup of fluid in the lungs.

Mourners gathered for a vigil Tuesday night in Revere after the bodies of three local women, all in their 20s, were found in a hotel room in the Central American nation of Belize.