St. Paul's school district says Monday's lockdown at Central High came after two students made weekend plans to fight each other at school.
In a statement emailed late Monday St. Paul Public Schools said the two knives and a BB gun taken from one of the students were never used at Central and were "swiftly confiscated."
School leaders said there were many witnesses to the confrontation between the students, which was verbal at first and then became physical. When it was discovered that one of them "could have had a weapon," Central went into a lockdown that lasted 85 minutes, the district says.
St. Paul police said earlier in the day that three people were taken into custody.
The district says there are "severe consequences for students who behave this way" and they'll follow procedures laid out in the Student Rights & Responsibilities Handbook.
Below is the story posted earlier Monday:
3 taken into custody after fight at St. Paul Central High School
St. Paul Central High School was on lockdown for about an hour Monday as officials investigated a fight and searched for a possible weapon.
A school resource officer responded to a report of a fight in a bathroom around 10:15 a.m., Steve Linders of the St. Paul Police Department told GoMN.
The resource officer was told one of the people involved in the fight "flashed" a handgun that was tucked into his waistband, Linders says.
The school was immediately put on lockdown while officials searched for the weapon.
The juvenile suspected of having the gun was found, but officials only found a knife, Linders said. Officers later found an airsoft gun in a student's backpack.
Three juvenile males were taken into custody, Linders said, and the lockdown was lifted just after 11:30 a.m., police tweeted.
The school district said on Facebook a total of two knives were recovered, adding all students are safe and school is continuing as normal.
Violence in schools
In December 2015, science teacher John Ekblad suffered a brain injury when he was attacked by a student as he tried to break up a fight.
Ekblad sued the school in 2016, saying it wasn't doing enough to protect its students. But his lawsuit was dismissed.
In February 2016, an officer used pepper spray to break up a brawl at the school that was started by posts on social media.
And in March of this year, a staff member was injured while breaking up a fight at the school.
The Centers for Disease Control and Prevention's Youth Risk Behavior Survey found nearly 8 percent of students in the U.S. had been in a physical fight at school at least once in the past 12 months.
Meanwhile, 4.1 percent of those surveyed said they carried a weapon (gun, knife or club) on school property at least once in the past 30 days.