An armed robbery suspect is on the loose tonight in Chico after police say he robbed City Liquor located on the Esplanade just before 9 a.m. According to police, one of the store clerks was outside loading the ice machine when the suspect approached him and told him to go inside. He then pulled out a silver semi-automatic handgun and demanded cash from the register. After the clerk handed over the cash he instructed both store clerks to get down on the ground. Police say the suspect fled the store on a dark mountain bike and was last seen heading south on the Esplanade. The suspect is described as a white male, in his late 30's, wearing a dark colored hooded jacked, blue jeans, and a dark ski mask. Police say they will be investigating the surveillance video this week.