A 17-year-old boy has been arrested on suspicion of attempted murder.

The arrest occurred after three people were assaulted with a sharp object at a secondary school in northern England, South Yorkshire Police said Wednesday.

Two adults and a child were treated for minor injuries but didn't need to be transported to a hospital, according to The Birley Academy.

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The school, formerly known as Birley Community College, was closed for the rest of Wednesday.

The school is located in the city of Sheffield.

The suspect was in custody.