A man who tried to steal from behind a Brooklyn deli counter ended up threatening a clerk with a pocketknife before running off, police said.

Authorities are looking for the suspect, who on Sept. 7 at around 9 p.m. walked into a deli on Fulton Street in Bed-Stuy.

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Described by investigators as a white man in his early 20s, the unidentified man was caught on surveillance video walking behind the store counter and grabbing an item.

The clerk pushed the man away from the counter. The suspect pushed back. 

Video then shows the man — who was described as 5-feet-8-inches tall, weighing about 160 pounds and had short, blond hair — get himself in a fighting stance before he wreaked havoc in the store.

Soon after he threw a beverage station onto the floor, the man was chased out and pulled out a pocket knife that he swung at two people before he ran away from the corner store empty handed.

NYPD said no one was hurt in the incident.

Police ask that anyone with information about the suspect call the NYPD's Crime Stoppers Hotline at 800-577-TIPS or text tips to 274637 (CRIMES) then enter TIP577.