HIAWATHA, Kan. (AP) — A school bus carrying more than 20 students has rolled over in northeast Kansas, injuring students onboard.

The Brown County Sheriff’s Department told MSCnews the accident involving the school bus from the Hiawatha school district occurred early Wednesday in Hiawatha.

Brown County Sheriff John Merchant says more than 20 students were on the bus, and all were taken to a hospital for assessment. Merchant says the students’ injuries don’t appear to be life-threatening. He says the students range in age from elementary school to high school.

Details of what caused the accident are still under investigation.

Merchant also says several people arrived at the scene to help the students.