California robbers robbed Starbucks with guns and knives, but white-haired old men subdued.

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Police in Fresno, Calif., released a surveillance video on Sunday showing a white-haired man subduing a robber with a gun and a knife at a Starbucks coffee shop.

Police said the 30-year-old suspect Ryan Michael Flores, wearing a Transformers mask, robbed a Starbucks store on Thursday afternoon, holding a gun and holding out a knife to threaten the clerk to hand over cash.

Cregg Jerri, 58, who was drinking coffee in the store, approached from behind while the suspect was blackmailing at the counter, picked up a chair and hit the suspect on the back.

The video shows Jerry, a white-haired man, wrestling with the tall, sturdy Flores, and finally, Jerry suppresses the suspect to the ground.

When Flores dropped the gun on the ground, Jerry realized that it wasn't a real gun.

Police said Jerry stabbed the suspect several times after he grabbed another weapon (knife).

Jerry was also injured in the fight. Both are currently being treated in hospital.

"there may not be many people in the United States who will do what Cregg Jerri did last night," Fresno Police Chief Jerry Dyer said on Friday, according to KSEE-TV. "it's an incredible hero, and most people think they will respond, but they may not have the courage to respond."

But the police do not encourage people to follow suit. "this is not what we recommend," Dale said of Jerry's behavior. " "in this case, this is a very good result: no one has died as a result of the incident, but there is likely to be [death]. Nevertheless, there is no doubt that he is a hero. "