A U.S. Customs and Border Protection officer fired his gun at another driver Tuesday morning during a dispute on the Van Wyck Expressway, according to the Port Authority police.

Officials said the incident happened around 4:45 a.m. on the highway’s southbound side, near the entrance to JFK Airport's central terminal area.

The officer told police he was involved in a minor two-car crash and the driver of the other car assaulted him, Port Authority officials said. The officer stated he fired his service weapon several times during the altercation, according to authorities.

Port Authority police said no one else was involved in the crash or shooting, and they were still investigating whether anyone was injured.

Officials urged travelers coming to the airport to expect possible residual delays and detours as the investigation continued Tuesday morning.

The U.S. Department of Homeland Security, which oversees Customs and Border Protection, did not immediately respond to a request for comment.

This is a developing story based on preliminary information from police and may be updated.