Several inmates were injured following simultaneous fights at the U.S. Penitentiary early Tuesday morning.

About 7:45 a.m. June 15, a fight ensued began at the recreation yard at the federal Correctional Complex. At around the same time, several additional fights began throughout the institution. Several inmates were treated for minor injuries in the Health Services Department at the complex.

Additional staff from the complex responded to the institution and the incidents were immediately contained, according to a press release from the Office of the Warden.

“The institution is secure and at no time was there a threat to public safety,” according to the press release. “We are currently investigating the circumstances surrounding this incident.”