Suffolk police are looking for the man who held up a Dunkin' Donuts shop at knifepoint Friday night.

Police say the man entered the location on Montauk Highway in Copiague shortly after 10 p.m. He displayed a hunting knife and demanded cash, and an employee opened the cash register drawer, according to police.

The robber took cash out of the register and fled.

Police describe the suspect as as a white male in his mid-20s who stands around 5 feet 11 inches tall and weighs about 170 pounds. He wore a dark green sweatshirt with a hood, blue jeans, black shoes and mismatched gloves -- one white and one black.

Investigators are asking anyone with information to call the First Squad at 631-854-8152 or to call Crime Stoppers anonymously at 1-800-220-TIPS.