WESTPORT — Four people were hospitalized Saturday night after a three-car crash with “heavy damage” on a local stretch of Interstate 95 — followed a short time later by another accident between three more vehicles.

Westport firefighters arriving at the first accident scene about 7:45 p.m. Saturday found three cars seriously damaged between I-95 southbound Exits 17 and 18. Engines 4 and 5, Rescue truck 5 and the shift commander were dispatched to the scene, according to the report by Assistant Fire Chief Brian Meadows.

The wreck and debris closed all three lanes of the highway.

After firefighters secured the scene, four injured people were transported to a hospital by Westport EMS. Details on their injuries were not immediately available.

The accident is being investigated by State Police.

Meanwhile, as firefighters were still at the scene of the first crash, another accident involving three vehicles was reported about a quarter-mile south on the highway. Two lanes of the road were closed.

Both fire and EMS crews were dispatched to the second site to help clear the highway and treat injured parties.

All lanes of the highway finally were cleared about 9:20 p.m., according to the fire report.