BAY SHORE, Long Island — A 9-year-old boy is dead after his mother was driving under the influence of alcohol and crashed head-on on Long Island, according to police.

It happened around 2:30 a.m. Thursday morning in the eastbound lanes of the Southern State Parkway near Exit 42.

According to police, the wrong-way driver fled an attempted traffic stop by a Suffolk County sheriff’s deputy.

The officer spotted the vehicle traveling the wrong way, heading west in the eastbound lane, and attempted to stop the vehicle, but the driver did not stop.

For safety reasons, when driving into oncoming traffic, the deputy stopped his attempts to stop the vehicle and moved into the westbound lanes to follow the driver in the proper flow of traffic.

When he was able to return to the eastbound lanes, he encountered a four-vehicle accident at exit 42.

The officer found the 9-year-old victim in the back seat of the vehicle. Emergency responders performed CPR and used an automated external defibrillator to save the child’s life.

The child’s mother, a Centerport resident, was taken to Good Samaritan Hospital in West Islip with non-life-threatening injuries.

Investigators believe she was driving in the wrong direction for some time before the accident, possibly even on the Sunrise Highway.

After the accident, she was subjected to a breathalyzer test and charges are expected.

The occupants of the other three vehicles involved in the crash were taken to South Side Hospital and Good Samaritan Hospital. Their injuries all appear to be non-life threatening.

The force of the impact separated the engine from the wrong-way vehicle and threw it into oncoming traffic.

The Suffolk County District Attorney and the State Attorney General’s Office responded and will investigate the accident.