The 17-year-old male student found dead behind the bleachers at Plainville High School early Tuesday morning took his own life.
The state medical examiner ruled the student's death a suicide.
Jeff Kitching, the superintendent of schools said police are classifying the investigation as an untimely death, and would not elaborate on who the student was, or how he died.
Police are not identifying the student until relatives are contacted. They do not believe other students were involved, and say there are no indicators any bullying was involved.
Michelle Boyiatzis says she was friends with the student.
"He didn't seem like the type of kid to do something like this without something pushing him over the edge," Boyiatzis said.
Kitching said that students arriving Tuesday morning were made aware of the investigation through an announcement, and the decision was made to keep students in class for the day.
Some students, however, have asked to go home early and school officials have complied.
"We are working with the police department and offering up our support and our thoughts and prayers for the family of the student," Kitching said.
Concerned Plainville residents stopped by Plainville High School after watching a slew of police, firefighters and the state medical examiner arrive on the football field.
Police said that a resident walking her dog early Tuesday morning made the discovery.
"It's scary," Plainville resident Katherine Lyons said. "We come down to the track and a lot of the time the kids ride their bikes here. It's scary."
The incident remains under investigation.
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