MCI-Concord, a medium security prison in Concord, Massachusetts, was placed on lockdown Friday morning after a group of inmates refused to disband in an open dormitory unit.
A spokesman for the Massachusetts Department of Correction said an emergency response was implemented, which included placing the facility into lockdown.
The matter was resolved without incident, the spokesman said.
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There was no damage to proeprty and no injuries to inmates or staff.
No further information was immediately available.