Inmate attack prompts lockdown at Washington prison

WALLA WALLA, Wash. -- Parts of the Washington State Penitentiary in Walla Walla were put on lockdown Tuesday afternoon after inmates attacked three correctional officers.

The attack happened at roughly 1:15 p.m. in a common area in the prison's West Complex, which consists of four separate units. According to the Department of Corrections, a number of inmates attacked three officers before being restrained by other staff members.

The officers were taken to a local hospital for treatment, but the severity of their injuries is unknown.

All four units in complex were immediately put on lockdown and will remain that way while staff and local police investigate the incident.

The entire prison houses about 2,200 offenders in minimum-, medium-, close- and maximum-custody units. The West Complex, which houses about 800 offenders, is a close-custody unit, according to the Department of Corrections.

None of the inmates involved in the attack were injured.