Two cops were hurt when a Brooklyn driver blew a stop sign and slammed into their cruiser Saturday, police said.

The squad car — on its way to an emergency with its lights and sirens blaring — was passing through the intersection of Ridgewood Avenue and Hemlock Street in Cypress Hills when a 63-year-old man driving a Chevrolet Trailblazer crashed into it, sending the patrol car careening into a fence, according to cops and witnesses.

“The policeman driving who hit the fence walked out of his car, looked at the passenger in the SUV and then laid down on the sidewalk,” said witness Emmanuel Correa, 33. “He looked really shaken up. He didn’t look like he was in good shape at all.”

The officer was wearing a neck brace after the incident, said witness Ericka Nieves, 19.

Both cops were taken to Jamaica Hospital for injuries to their backs and necks, cops said. The driver was taken to the same hospital for non-life-threatening injuries.

The driver was not charged as of late Saturday.