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Kennedy High School in Waterbury was placed into lockdown Friday morning after a student from another school entered the building and was believed to have a weapon, according to the school district.
A student from Kennedy high allowed a Wilby High School student into the building, the district said.
West Side Middle School also activated a shelter-in-place due to its close proximity to Kennedy High.
Police were called and no weapon was found, according to the school district.
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Friday's incident came just a day after a student brought a gun to Crosby High School. That school and Wallace Middle School activated a shelter-in-place. The 18-year-old student who had the gun was arrested and is facing several charges.
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