(AP) – An investigation was underway into the cause of an explosion and large fire at a shopping center in Harrisonburg, Virginia, that injured at least five people Saturday morning. The strip mall contained a vape shop, musical instrument store and recording studio, according to the Daily News-Record. The building where the blast occurred was about 30 yards (27 meters) from the race’s start and finish line, the school said. Families who lived nearby told TV station WHSV the blast shook their homes. “It woke me up personally and I mean, I knew right away that it was something not normal,” Katie Landes told the station.