A Suffolk County police officer was injured Friday night on the Long Island Expressway when a sport utility vehicle crashed into a marked department car, police said.

The officer was driving between westbound Exits 55 to 53 in Hauppauge, helping to close the road for overnight construction around 11:30 p.m., a police spokeswoman said. The SUV, driven by a woman, 62, struck the back of the police vehicle. The officer was traveling slowly with the vehicle’s lights on, the spokeswoman said.

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The officer was taken to Stony Brook University Hospital with injuries not considered life-threatening, police said.

The SUV driver and her two passengers were taken to Southside Hospital in Bay Shore as a precaution, police said.

The woman, whose name was not released, was issued summonses for failure to comply with lane closures, improper speed in a construction area and unsafe lane change, police said.