An air ambulance has been called in following a collision in Keswick.

According to the York Regional Police, the collision occurred at the intersection of Woodbine Avenue and Morton Road around 4:30 p.m. and involves two or three vehicles.

At least one of the occupants have suffered serious injuries.

A social media post from police around 5 p.m. notes that the air ambulance will be landing shortly to assist.

Motorists are asked to avoid the area.