TECUMSEH, Neb. (AP) — Nebraska prisons officials are reporting another attack on prison staff by an inmate.

The Nebraska Department of Correctional Services says an inmate hit three staff members at the Tecumseh State Correctional Institution on Friday as they tried to restrain him.

Officials say all three staff members were treated for minor injuries and released from the Johnson County Hospital.

A week earlier, on Sept. 2, the prison was placed on lockdown after officials received information that violent attacks on staff members had been planned.

There has been a rash of attacks on corrections officers and staff at various Nebraska prisons over several months, including one last month in Lincoln that officials say was carried about by a dozen inmates and left nine officers injured.