WEST DES MOINES, Iowa (AP) — Authorities say a West Des Moines associate high school principal was injured while intervening in a student fight. A letter sent to Valley High School students’ families says the fight broke out around 8:10 a.m. Thursday and was a continuation of a conflict earlier in the week. Administrators had met earlier with one of the students in an attempt to defuse the situation.

District spokeswoman Laine Mendenhall-Buck says no students were injured Thursday, but associate principal David Perrigo was taken to a hospital for examination. Mendenhall-Buck says it’s her understanding Perrigo was accidentally injured and not targeted by any of the four students involved.

The letter says three students involved in the fight were taken to the school office and their parents were contacted. The fourth student left school. West Des Moines Police are investigating.