CONCORD, N.H. (AP) – Officials are investigating a fight among inmates at the state prison in Berlin that resulted in a two-day lockdown.

Authorities said a fist fight broke out Saturday and three inmates had to be taken to Androscoggin Valley Hospital for injuries.

Then on Sunday, officials moved six inmates from the unit where the fight broke out to the prison in Concord.

State police and the Department of Corrections are investigating the disturbance.