WILLISTON PARK - A man wearing a surgical mask on his face held up a Dunkin' Donuts shop in Nassau at knife point, police say.

Surveillance images captured the confrontation in the restaurant on Hillside Avenue in Williston Park Friday night.

Police say the man pulled out a knife and demanded cash, then fled with the proceeds.

Detectives say they do not believe the case is connected to a recent string of robberies targeting Dunkin' Donuts in Nassau County.