There were no serious injuries after a collision between a school bus and a semi-trailer on a grid road north of Regina.

The crash happened Tuesday afternoon about eight kilometres north of Zehner.

Witnesses say it appears the bus was pulling out of a driveway when it collided with the semi, which was hauling hay bales.

RCMP say three children were on board the bus at the time of the crash. All were treated for minor injuries at the scene. The driver of the bus also suffered minor injuries.

The driver of the semi wasn’t hurt.

The collision is under investigation.