Ontario Provincial Police are investigating reports of rocks and other items being thrown from overpasses onto vehicles on Highway 401 in South Dundas. Police said officers have responded to several calls about the issue over the past few weeks. The incidents occurred between 4:30 a.m. and 6 a.m. Police said no one has been hurt but there have been reports of damage to vehicles. Anyone with information or dashcam footage related to these incidents is asked to contact the SD&G OPP at 1-888-310-1122. To remain anonymous, contact Crime Stoppers at 1-800-222-8477 or submit a tip online at ontariocrimestoppers.ca.