WOODBURN, Ore. (AP) — Three teenagers escaped the McLaren Youth Correctional Facility in Woodburn early Sunday after authorities said they attacked a staff member.

The Oregon Youth Authority says the three young men who escaped through a fence early Sunday are considered a risk to themselves or others and urged anyone who sees them to call 911, The Oregonian/OregonLive reported.

The three were identified as Preston Andrizzi, who was convicted of second-degree assault in Marion County; Anthony Fitz-Henry, adjudicated for second-degree burglary in Marion County; and Christian Goin, adjudicated for fourth-degree assault in Linn County.

All three are from the Salem and Albany areas.

MacLaren, the state’s largest juvenile correctional campus, was placed on lockdown after the escape, and visitation was canceled for the day.

Sarah Evans, a spokesperson for the Oregon Youth Authority, said it was the first escape at the facility since at least 2000, when a perimeter fence was installed.

Evans said the three assaulted a staff member and took their keys, then escaped through a hole in the fence. The staff member was treated at a hospital and released, she said. The hole has been repaired, Evans said.

The approximately 200 youth at the facility are held in locked dormitory-style living units.