South Bruce OPP say two children who were passengers in a buggy involved in a collision with a vehicle have died.
Police say it happened just before 9 Sunday night on Bruce County Road 10 in Brant Township, south of Elmwood.
OPP say they responded to the scene with members of the Elmwood Fire Department and Bruce County paramedics.
Ten year old Melena Jantzi of West Grey Township was pronounced deceased at the scene.
Nine year old Brodie Jantzi of West Grey Township, who was air lifted to London later died of his injuries.
OPP have not released information about the other vehicle involved in the collision.