Nassau police are investigating three robberies that occurred throughout the county late Friday and early Saturday.
First Squad detectives are searching for a man who walked into the U.S. Petroleum Gas Station, at 465 Nassau Rd. in Roosevelt, demanding money and threatening an employee with a knife before 10 p.m. on Friday.
The 26-year-old employee complied, and the subject fled on foot eastbound on Grenada Avenue with an unknown amount of cash.
Also, First Squad detectives are investigating a robbery that occurred in Baldwin about 2:20 a.m.
Police said a 59-year-old woman was in the parking lot of Basket of Laundry, at 1000 Merrick Rd., loading laundry into her 2004 gray Hyundai Accent when a man grabbed her from behind, demanded her car keys and threw her to the ground.
The man then fled in the car, New York State license plate number CYJ-3587, traveling west on Merrick Road.
He is described as being 5 foot6 to 5 foot 7 inches tall, thin build, dark hooded sweatshirt with no zipper, long dark pants. The victim bruised her left elbow, police said.
The third robbery occurred in Farmingdale about 3:15 a.m., when police said a man held up a 7-Eleven store at 85 Merritts Rd.
The subject kept his hand under his sweatshirt, simulating a weapon, and demanded money. No weapon was seen, and after obtaining an unknown amount of cash, the subject fled the scene by unknown means.
No injuries were reported. The subject was further described as about 30 to 40 years old, 5 foot8 inches tall, average build wearing a black hooded sweatshirt with a "Champion" logo, tan shorts, black sneakers and white socks.
Detectives ask anyone with information on these crimes to contact Nassau County Crime Stoppers at 800-244-TIPS. All callers will remain anonymous.