Salem Police say they've never seen someone so determined to destroy a strip mall in Salem. The third fire in five weeks damaged a restaurant at the Plaza del Sol around 4 a.m. Thursday morning. Officers say all the fires appear to be the work of amateurs using accelerants early in the morning, when the building was not occupied. Surveillance video shows two men running from the building. Flames punched through the roof of the La Movida Bar and Grill , but a sprinkler system saved 6 other businesses in the building.