The incident took place in Danbury on Thursday, Sept. 22.
According to the Danbury Police, officers were quickly able to identify a suspect and make an arrest after becoming aware of a social media threat regarding Danbury High School.
Although there was an arrest, the department said there will be an increased police presence at the school at both opening and dismissals, as well as extra patrols throughout the day.
The teen was not named and the type of threat made was not revealed.
This is a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice Ridgefield and receive free news updates.