46-year old Cheri Larrydale was walking northbound on Broadway Avenue, crossing Veterans Memorial Highway, when she was struck by a vehicle traveling westbound on Veterans Memorial Highway at about 12:40 a.m. Saturday.
She was pronounced dead at the scene.
Suffolk County Police are looking for a vehicle with front end and headlight assembly damage.
Detectives are asking anyone with information about the crash to contact the Vehicular Crime Unit at 631-852-6555 or call anonymously to Crime Stoppers at 1-800-220-TIPS.