CHAMBERSBURG, Pa. (AP) — Pennsylvania state police say five people died when a recreational vehicle blew a tire on an interstate highway, crossed the median and collided head-on with a tractor-trailer. The crash occurred Wednesday on northbound Interstate 81 near Chambersburg. The RV was heading south and towing a trailer. It crossed a grassy median after the tire blew and struck the truck. Four people in the RV and the truck driver were all pronounced dead at the scene. The victims in the RV were from Middletown, Pennsylvania. The truck driver was from Martinsburg, West Virginia. No other injuries were reported.