Officials at the Minnesota Correctional Facility-Stillwater last week had said that a lockdown would likely be lifted by Monday, but the prison marked Day 6 of the lockdown Tuesday, the Pioneer Press reported.
A precise explanation has not been given. The Pioneer Press reports a spokesman said Tuesday morning there were "ongoing security operations" at the Bayport facility, but he did not elaborate. He said there could be more information later this week, the newspaper reported.
During lockdowns, inmates are confined to their cells 24 hours a day and visitations are not permitted. Full-prison lockdowns are fairly rare. The last one at Stillwater was in 2011.
The lockdown was not prompted by a fight or disturbance, KSTP had reported.
The prison, built in 1914, is the state’s largest "close-security," level four institution for adult male felons, the Minnesota Department of Corrections reports. Level five is maximum security (here are the level rankings and prison locations). The prison's population is about 1,600, the department reports.