Police are searching for a gray or silver BMW a witness said struck and critically wounded a man near Exit 21 on the Southern State Parkway early Sunday in Roosevelt.
New York State Police said troopers were called to the scene of the accident at 1:10 a.m. Sunday.
Police said they found Bayron Gonzalez-Cordova, 24, "semiconscious and badly hurt" at the westbound exit ramp to Nassau Road.
Police said they identified the victim through his passport - but said he carried no other identification and that they have been unable to contact family or friends.
Police said a witness told them that Gonzalez-Cordova had been struck by a gray or silver BMW and that the car sustained front-end damage.
Police are asking anyone with information to contact them at 631-756-3300. All calls will remain confidential.