Sparks Police have arrested four suspects believed to have been involved in a road rage incident back on August 20th. The incident at Greenbrae Drive and Probasco Way escalated into a physical alternations. One person was transported to the hospital with live threatening head injuries. They are now listed in stable condition. Edwin Lopez, Angel Hernandez-Ayala, Angel Luna and Alfredo Villa were all arrested Tuesday. All have been charged with Battery Causing Substantial Bodily Harm.