One person was airlifted to Stony Brook University Hospital following a two-vehicle crash in Flanders, Southampton Town police said.
A pickup truck and a minivan collided near the intersection of Route 24 and Pleasure Drive at around 6:45 p.m., police said.
The driver of the pickup truck was airlifted to the hospital, police said.
A portion of Route 24 was closed during the rescue efforts.
No other details were immediately available.