Bloomfield high school was on lockdown for approximately 25 minutes on Friday morning, school officials said.
According to a message on the district website, the school went into lockdown at 7:50 a.m. after a former student entered the building without permission and could not be found.
Bloomfield Police responded and students and teachers followed the district's lockdown procedures until the lockdown was lifted at 8:15 am when the former student was discovered at his home.
Find out what's happening in Bloomfieldfor free with the latest updates from Patch.
Get more local news delivered straight to your inbox. Sign up for free Patch newsletters and alerts.