The Ontario Fire Marshal’s Office has been called in, following a house fire in the Township of Georgian Bluffs overnight.

Grey County OPP, along with three area fire departments attended the scene of a fire Wednesday morning around 3:20 a.m., at a two storey farm house on Sideroad 115, north of Jackson.

Four people were found at the scene and transported to hospital. Of those, three have been released, while one has been airlifted to Toronto for treatment of serious injuries.

The investigation is early going.