Police say a Williston Park Dunkin' Donuts was robbed at knifepoint for the second time in a week on Wednesday night.

According to authorities, a man entered Dunkin' Donuts, located at 276 Hillside Ave., displayed a knife and demanded the store employee to open the cash register at 8:32 p.m. The man then fled the store westbound on Hillside Avenue with an undisclosed amount of cash.

No injuries were reported. Police described the man as white, between 5 feet 10 inches tall to 6 feet tall, with a heavy set build, and wearing a white-hooded sweatshirt with dark lettering, dark jeans, boots and a mask over his face.

The same store was also robbed at knifepoint Friday night by a person with a similar description. Although the man does not match the description, police are also looking to identify the man who has been robbing several Dunkin' Donuts , 7-Eleven, Carvel and Subway stores at knifepoint across Nassau County over the past month.

Detectives ask anyone with information about this crime to contact Nassau County Crime Stoppers at 1-800-244-TIPS. All callers will remain anonymous.