Mill Creek MetroParks posted to its Facebook page that Lanterman’s Mill will be closed Friday due to an unexpected emergency, and the closure will keep the facility from reopening until next week.

According to an email from Mill Creek MetroParks Community Engagement Director, Jamie Yohman, a staff member suffered a "serious medical injury" and had to be taken to the hospital. 

Yohman says other staff were "shaken up" by the incident.

At this time, it is unknown what the nature of this injury was or what caused it.