The Eastern Connecticut Health Network says Manchester Hospital was locked down Thursday.
A school in Montville that was locked down because of a phone call that made reference to weapons has reopened after a search did not turn up any weapons.
Bristol police say Bristol Central High School was placed in lockdown after what they described as an idle threat on the social networking site Facebook.
A lockdown has been ordered for schools in North Stonington as Connecticut state police search the area for a person who fled on foot after a traffic stop.
The Department of Correction says the Osborne Correctional Institution in Somers was locked down during the overnight hours Monday night after discovery of an unspecified security matter.