Students from technical school located in Ansonia were dismissed early after a threat was written on a wall in the building, officials said.
According to police, a student at the Emmett O'Brien Vocational Technical School found the message "there is a bomb in the school" written on a hallway wall late Monday morning.
After the school was evacuated, police swept the building with two dogs and no suspicious items were located.
No injuries were reported.
State police investigating the incident and no arrests have been made at this time.
Police said the school has received no other threats.
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