Students at Orville H. Platt High School in Meriden were met with a larger police presence on Tuesday.
Officers said the beefed up security is in response to a vicious brawl on Monday that led to the arrests of five students.
What remains unclear is what led to the fight.
Parents said they're questioning why it took so long for them to find out about the incident.
Eyewitness video showed that the brawl started with at least two students.
"We were pretty scared," said Mahmoud Hassan, a Platt freshman. "We didn't take it as a joke at all."
Police said they're still investigating the motives behind the fight.
Students who spoke to Eyewitness News said they believe it was "typical high school drama."
At the time, police said they didn't know that and sent every on-duty officer to the school. As they responded, Platt was placed into lockdown.
Students were notified, many of whom told parents before the school did.
"[It's] very worrisome because you can't get to them," said Rich Courchesne, a Platt parent. "Thank God there's cell phones so you can kind of stay in touch and know what's going on."
Additional officers were in place for dismissal on Monday.
Students said they don't believe tensions will be as high on Tuesday. However, police said they won't be taking any chances.
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Five students were arrested after a large fight at a high school in Meriden into lockdown on Monday.