Four people were sent to the hospital after an electrical mishap at the women's Correctional Facility in Shakopee. Neighbors told KARE 11 they heard a loud explosion before the area lost power, including the prison.
KARE has video from the scene below:
The extent of the injuries was unknown, but the Star Tribune reports three of the four workers were expected to be released on Monday.
No prison staff or inmates were injured, but WCCO reports the facility was put on lockdown.
The Shakopee Public Utility confirmed a crew was working on a scheduled project before the incident.