NORTH BABYLON - Police are searching for witnesses who can help piece together the cause of a fiery crash that killed five family members on the Southern State Parkway.

The crash happened near Exit 39 in the westbound lanes, within the town of Babylon.

State police say the driver, 37-year-old Myriam Lebrun of Brooklyn, veered off the road and hit a tree just before 11 p.m. Saturday.

Lebrun was killed, along with her three children and her mother.

Police have identified the other victims as 68-year-old Moise Yolande, 14-year-old Marcus Jeanty, 9-year-old Marcel Jeanty and 8-year-old Kayla Jeanty.

Police say the group was headed back to Brooklyn following a family gathering in Brentwood. Family members who spoke to News 12 Long Island are in shock that the cousins they just saw are no longer with them.

Police say it's unclear why the car left the highway.

Anyone who may have witnessed the crash is urged to call state police at 631-756-3300.