A horrifying scene unfolded in Hawaii on Tuesday … as a plane crashed into a building, killing two people onboard.

The tragic incident was captured on dashcam video attached to a vehicle traveling down a highway in Honolulu on Tuesday afternoon while the Kamaka Air Cessna 208 Caravan was conducting a training flight in the skies above.

Check out the footage … as the car barrels down the roadway, the dashcam captures the aircraft rapidly descending in the distance.

Moments later, the jet slammed into a building — which was empty, state-owned and awaiting demolition, according to Hawaii News Now — causing a large plume of black smoke to rise up. Firefighters quickly responded and extinguished the flames.

Hawaiian authorities held a press conference … announcing, among other things, that two people were onboard the plane and were killed when it went down.