The crash occurred just after 1 p.m. at the intersection of Mount Sinai-Coram Road and Route 25, police said. The officer was traveling north on Mount Sinai-Coram Road and collided with a Chevrolet Corvette traveling west on Route 25. Also involved was a Toyota waiting to make a turn.
After the collision, the Corvette caught fire and the officer extinguished the blaze with an extinguisher.
The officer and two occupants of the Corvette were taken to Stony Brook University Hospital for treatment of what was described as nonlife-threatening injuries.
The accident is still under investigation.