A teller activated a silent panic alarm when a man demanded money at a credit union on Tucson's northwest side Thursday, authorities said.
Deputies were dispatched to Arizona State Credit Union at 6456 N. Oracle Road at about 10 a.m. in response to the alarm, said Deputy Ryan Inglett, a Pima County Sheriff's Department spokesman.
When deputies arrived, they found out that a man entered the credit union and handed one of the tellers a note demanding money, Inglett said.
The teller gave him an undisclosed amount of cash and activated the silent alarm.
Robbery detectives have taken over the investigation.
Detectives are asking the public for help in identifying the man who was captured on a surveillance camera.
He is described as white and in his 50s. He is about 5 feet 10 inches tall, and weighs about 180 pounds. He was last seen wearing a Kansas State University hat, a blue flannel shirt and jeans, said Inglett.
Anyone with information is asked to call 911 or 88-CRIME.
