A brawl between two girls of the same age at a primary school in Karlskoga ended with one of them pulling out a knife and cutting the other, reports KT/Kuriren.
The brawl broke out on Monday and according to the newspaper, one of the girls was seriously injured.
The incident has been reported to the police.
There is a report classified as assault/gross assault, says Anders Dahlman at the Bergslagen police region, to TT.
The incident, which is said to have occurred during lunchtime outdoors, was witnessed by about 15 peers. It is unclear how severe the girl's injuries are.