A deputy "suddenly passed away" while on duty at the Olmsted County jail in Rochester.
The Olmsted County Sheriff's Office announced the death of Detention Deputy Mark Edward Anderson, who was on duty at the county's Adult Detention Center when he died.
He was found in the male locker room by his partner at 9:30 a.m. Thursday, with lifesaving measures conducted at the scene. He was then taken to St. Mary's Hospital, where he was pronounced dead.
"At this time, we believe this to be a medical related event," the sheriff's office said.
"We extend our heartfelt thoughts and prayers in this difficult time and join with his family and friends to honor and remember the service and sacrifice of Deputy Mark Edward Anderson, badge #1743," it added.
Edwards, the sheriff's office said, "was known for his diligence, patience, and ability to talk to anyone during his 11-year career with the Adult Detention Center."
He started working for the county in 1995, spending many years as a counselor with the former Many Rivers Juvenile Detention Center, before transferring to the ADC in 2010.
More information is expected to be released in the coming days.