Eighth Squad Detectives are investigating a robbery that occurred on Saturday, May 13, 2023, at 1:40 am in Bethpage.According to detectives, an unknown male entered 7-11 located at 4220 Hempstead Turnpike. The subject displayed a knife and demanded cash. The male employee complied, opened the register and the subject removed an undisclosed amount of US currency. The subject fled on foot in an unknown direction.No injuries were reported.The subject is described as a male white with a medium build. He was wearing dark clothing and a surgical mask.Detectives request anyone with information regarding the above incident to contact Nassau County Crime Stoppers at 1-800-244-TIPS or call 911. All callers will remain anonymous.