Vacaville police arrested an 18-year-old Vacaville man Friday night for possession of cocaine for sale and possession of drugs while armed. Police served Jonathan Jacko a search warrant shortly after 9 p.m. Friday at the River Run apartment complex in the 1100 block of Farmington Drive, according to police. Authorities served the warrant as part of an investigation into Jacko’s alleged sales of cocaine in the city, police said. During a search of the apartment, investigators found about two ounces of cocaine, two ounces of marijuana, evidence of drug sales, and a loaded 9-millimeter handgun, according to police. Jacko was arrested and taken to county jail in Fairfield. Copyright © 2009 by Bay City News, Inc. — Republication, Rebroadcast or any other Reuse without the express written consent of Bay City News, Inc. is prohibited.