A three year old boy from Mecosta County died in a two vehicle accident in Mt. Pleasant Saturday.

The Isabella County Sheriff's Office say a deputy witnessed two vehicles collide. The deputy immediately approached the crash to discover that there were three children ranging in ages from 3 to 14 and one adult in a vehicle.

The deputy also confirmed one occupant in the pickup.

The 3-year boy was pronounced deceased at the scene, the other two siblings, along with the adult family member (all from Mecosta County) were taken to a local hospital for treatment.

A male sibling was then flown to Devos Children’s hospital in critical condition.

The driver and only occupant of the pickup truck, a 33-year-old man from Union Twp refused medical treatment.

Deputies add the crash is still under investigation, but early findings point towards an improper turn at the intersection.