TECUMSEH, Neb. (AP) — State officials say several inmates have been involved in an altercation at the prison in Tecumseh.

A Nebraska Correctional Services Department news release says two inmates involved Thursday were taken to a medical facility outside the prison for treatment. Prison spokeswoman Andrew Nystrom said Friday that one of them was treated and returned to the prison, and the other was taken to a Lincoln hospital for treatment. He couldn’t immediately say whether that prisoner had been returned to the prison as well.

Guards used pepper spray to break up the fight, and Nystrom says none of them was injured. He couldn’t say exactly how many inmates were involved.

The unit where the fight occurred is locked down.