A 14-year-old was seriously injured while riding a bike after being struck by a car Saturday night in Mercer County, authorities said. The East Windsor Police Department responded to a reported collision around 9:30 p.m. involving a pickup truck and bicyclist near Twin Rivers Drive North and Ithaca Place, said East Windsor Police Department Lt. Thomas Meyer. The truck, driven by a 66-year-old East Windsor resident, hit the bicyclist as the teen was crossing Twin Rivers Drive North, officials said. The bicyclist “was thrown from the bike and sustained serious injuries,” Meyer said. The teen, wh…