Police are investigating after two unrelated men died in Fort Collins of possible heroin overdoses.

Following autopsies on both Wednesday morning, the Larimer County Coroner's Office identified one man as Austin A. Powers, 24, of Fort Collins.

Powers' roommate called 911 early Wednesday morning after he found Powers unresponsive in their home, in the 100 block of East Trilby Road. Paramedics were unable to revive Powers, a release from Fort Collins Police Services spokeswoman Rita Davis said.

The other man, 29, of Fort Collins was named as Charles W. Reno. A roommate called 911 after finding Reno and fellow roommate, 25, unconscious Tuesday morning in their house, in the 2900 block of Tumbleweed Lane.

The 25-year-old man, not yet identified by authorities, was taken to the hospital for treatment of a potential drug overdose, Davis said. The 29-year-old died on scene.

Though autopsies lead investigators to believe both men died of heroin overdoses, final manner and cause of death for each will not be known until the Coroner's Office receives results of toxicology reports in about a week.

At this time, there is no evidence to connect these deaths with that of Colorado State University student Sean William McGowan, 18, Davis said. The English major died Monday at Poudre Valley Hospital of a potential drug overdose after found in his dorm room on campus.

Authorities remind people that while prescription pain killers are leaders among drug overdose deaths nationwide, heroin has a presence in Northern Colorado. The Coroner's Office has tallied four heroin-related deaths in the county in 2011 and suspects heroin in these three cases this week.