NORTHAMPTON, Mass. — Two people were injured and three vehicles including a state police cruiser were damaged when a high-speed chase ended in a fiery crash at a highway construction site.State police say the pursuit started on Interstate 91 in West Springfield at about 2:40 a.m. Wednesday when troopers spotted a car driven by a man wanted by police.The pursuit continued to Northampton, where police deployed tire deflation devices and the car crashed into a construction sign and a contractor's truck.