An evening bike ride turned violent for a local teenager last night. An 18–year–old man claims he was jumped while riding his bike on a dirt road near 34 road and the Grand Valley Canal road around 9:30 Saturday night. The teenager told police that two men attacked him, stabbed him with a screwdriver, and took his cell phone and wallet. The alleged victim refused transport to the hospital for his injuries and the Mesa County Sheriff's Department continues to investigate the incident. There is no suspect information at this time.