On January 21, 2008 two private planes collided in Corona, killing five people, including one on the ground. The collision occurred about a mile away from the Corona Municipal Airport above Serfas Club Drive. The crash wreckage left debris strewn along a commercial strip near the 91 Freeway. Eyewitnesses claimed to have seen an explosion in the air and two different bodies fall from the sky. The aircraft involved were both single-engine Cessnas, a two-seat Cessna 150 and a four-seat Cessna 172. Investigators from the National Transportation Safety Board, local Corona police detectives, and the Federal Aviation Administration began their probe the following day. As of January 23 a cause for the accident was yet to be determined.