All three were treated and released from a local hospital, according to the Star Tribune in Minnesota.
Authorities say an 8-year-old student took a kitchen knife to a central Minnesota elementary school and attacked three other children. No one was severely injured during the incident but the students needed a couple of stitches.
The threats have been taken seriously by police and the man is expected to appear in court on Tuesday with a view to being remanded in custody over the offence, West Copenhagen Police have confirmed.
"I don't think he had an intended target when he came to school with a knife", Sauk Rapids Police Chief Chief Perry Beise tells WCCO.
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This morning we had an unfortunate incident that happened before school started.
Superintendent Bruce Watkins wouldn't say how old the child was that brought the knife, only that he is a student at Pleasantview.
The attacker will not be allowed back into the school, the paper said. The case will be forwarded to the Benton County Attorney's Office.
A 19-year-old former student at Marjory Stoneman Douglas High School in Parkland, Florida, is accused of bringing an assault rifle to the school in February and killing 17 students and staff members. The other two are Pleasantview Elementary students. Currently, we are working with school support staff to identify and provide support to staff and students that may have been impacted by this incident. There are approximately 790 students enrolled at the elementary school. The chief says he doesn't know if the boy had been bullied or had mental health issues.