An inmate from the Drumheller Institution died while in custody on Sunday.
Correctional Services Canada said the 42-year-old man had been serving a nearly 5 year long sentence since March.
The inmate's next of kin have been notified of his death.
A lockdown is in place in the medium security unit at the institution to allow staff to conduct a search of the building.
Normal operations will resume as soon as it is considered safe to do so.
Correctional Service Canada will review the circumstances of the man’s death.