The robbery was reported at 9:12 a.m. at the Wells Fargo branch at 3301 W. Chinden Blvd., Garden City.
Police said a man entered the bank, made threats to the tellers and demanded money. After getting the cash, the man stuffed it in a soft guitar case and fled on foot.
He was last seen running south and west on Stockton Street. Police believe he may have jumped into a car from that location because canine trackers lost his scent there.
The suspect is described as a white man in his 20s, about 145 pounds and dyed red hair. He was wearing a white hooded sweatshirt — with the hood over his head — and a black jacket that has green lettering on it.
According to conversations between police and dispatchers, the robber told a bank worker he had explosives strapped to him. Police Chief Rick Allen declined to comment on the types of threats made in the robbery.
While responding to the robbery, a Garden City police vehicle traveling with emergency equipment activated collided with a Toyota 4-Runner at Chinden Boulevard and East 43rd Street. No one was injured in the low-speed collision. Weather conditions made the collision unavoidable, Garden City police said. Boise police are investigating the crash.
Anyone with information about the robbery, or the suspect, is urged to contact the Garden City Police Department at 472-2950, or remain anonymous and call Crime Stoppers at 343-2677 (COPS).