EDDYVILLE, Ky. (AP) -- Kentucky corrections officials have placed 43 inmates at the Kentucky State Penitentiary in Eddyville in segregation after a series of fights that broke out at the facility last week.

The Department of Corrections says the prison has been on lockdown since the fights broke out Thursday afternoon and will remain so during an investigation. Visitation is canceled until further notice at the prison because of the lockdown status.

A statement from the department says the fights started with an argument during recreation, then escalated into a fight in the prison gym later. Officials say after that fight was brought under control, other inmates began fighting on the prison yard.

Three inmates were taken out of the prison for medical treatment. Two were treated and released, and the third was released the following day. No staff members were hurt.