Two 20-year-old motorcyclists collided, killing one and seriously injuring the other on a private dirt road in San Diego County, California

He said a 20-year-old rider on a KTM motorcycle was going 55 to 60 mph when a rider on a Yamaha WR250 motorcycle drove onto the road from a residence. The Yamaha motorcyclist, also 20, failed to see the KTM rider, and the two crashed into each other, Grieshaber said.