UPDATE: Omaha Police have arrested three teenage boys for a felony assault at the 2400 block North 34th Avenue Saturday after three victims were shot or stabbed. Investigators say there was an altercation between two groups of juveniles, both in possession of firearms and knives. After treatment at the hospital, three teens were booked at the Douglas County Youth Center. According to a media release, investigators also say they think additional parties were involved that fled the area before officers arrived.