Twenty-one people including a driver were injured on Monday morning when two buses collided north of the Norwegian capital of Oslo.

Three of them were seriously wounded, rescue personnel on the site were quoted as saying by Norwegian media.

It seemed that one bus ran onto the opposite lane when it was negotiating a tight curve at Lindeberg, north of Oslo and had a head-on crash with the other bus.

The driver on one bus got stuck in the vehicle after the collision.

All the injured were taken to hospital for medical check and treatment.

Both buses were severely damaged in their front.