Authorities are hoping a surveillance photo will help lead to an arrest.
Suffolk County police say a silver minivan hit a 14-year-old boy on a bike in Shirley around 10:30 a.m. on May 11.
The teen, who is expected to be okay, was hit on William Floyd Parkway at Roberts Road.
Police say the driver actually stopped and got out of the van, then jumped back in and sped off.
Anyone with information about this crime is asked to call Crime Stoppers anonymously at 1-800-220-TIPS.