At approximately 5 P.M. 2008 Sept 04 a 911 call was received by police from a residence in the 400 Block of Av G So. The caller indicated a violent incident was in progress involving a firearm and knives. Patrol officers responded and dealt with 11 persons both male and female of various ages through the course of the investigation. Several persons involved in this incident were unaccounted for and all information lead back to the residence. A perimeter was established and the residence was contained. To ensure a safe resoultion the Emergency Response Team was called out and deployed. The residence was secured and a handgun recovered. At the time of this release 4 persons 2 males and 2 females in their 20's have been arrested on a number of charges. The investigation is ongoing.