Boulder police said five men were treated at the scene or taken to the hospital, and one of them — whose prognosis initially had been “grave” — remained hospitalized Tuesday.

Police are investigating after at least six students overdosed on a "possibly tainted batch of cocaine" at a fraternity house.

Six University of Colorado students overdosed on tainted drugs over the weekend, according to the Boulder Police Department.

Police are investigating after six college students overdosed Saturday night on potentially tainted drugs at a Kappa Sigma house party.

Boulder Police said no deaths have been reported after six men overdosed on a batch of cocaine that was possibly tainted during a party.

In an update Tuesday, the Boulder Police Department walked back its claim that University of Colorado Boulder students overdosed on a possibly tainted batch of cocaine over the weekend.

Boulder police are backtracking on their claim that a group of University of Colorado students overdosed on drugs laced with fentanyl.