A deadly crash at the border of Allegan and Van Buren counties is under investigation. South Haven Area Emergency Services sent a crew to assist sheriff’s deputies from both counties at 9:40 Sunday night on Baseline Road near 59th Street on the Allegan County side of Casco Township. One person was found dead inside a vehicle that had gone airborne when it hit the side of a bridge, landing upside down several hundred feet away. A passerby found the wreckage in a wooded area and called police. It’s not yet known how much time had passed between the crash and the discovery of the car. The name of the driver, who was the only one in the vehicle, has not yet been released.