BOSTON (CBS) – Boston Police are investigating the death of a third person at a Roslindale apartment complex.

Last Thursday, officers responded to 1 Cliffmont Street and found a woman in her fifties suffering from an unknown life threatening condition. She was taken to Brigham & Women’s Hospital and died on Monday.

In the 24 hours prior to the call about the woman, police found two men, both in their sixties, dead in separate areas of the same apartment building.

There were no visible injuries or trauma observed on any of the victims. Police are awaiting toxicology reports.

Residents of the apartment building say the three socialized, and sometimes drank heavily, and that’s where investigators are focusing their attention.

The property is operated by the Boston Housing Authority.