After a three month investigation, Santa Barbara Sheriff Gang Enforcement Detectives arrested two gang members for possession of firearms, extortion, robbery, elder abuse and possession of a stolen vehicle. Gang Detectives are still attempting to locate two additional suspect associated with the case, who are believed to be in the Santa Maria area. 28 year old Mark Silvas of Santa Maria is wanted for vehicle theft and gang relates charge. He has a $135,000.00 warrant issued for his arrest. Twenty-seven-year-old Rosalio Estrada of Santa Maria is wanted for vehicle theft, extortion and gang related charges. He had a $150,000.00 issue d for his arrest. If you have any information about the whereabouts of Estrada or Silvas please contact the Santa Barbara Sheriff's Anonymous Tip line at (805) 681-4150.