A reward of up to $10,000 is being offered for information about a man who authorities say exchanged gunfire with a New York guardsman he was trying to rob in Union County.

No injuries were reported in the robbery, which occurred around 1 a.m. Sunday in Elizabeth.

Union County prosecutors say the victim, a New York Air National Guard Security Forces member, was sitting in a parked vehicle when the suspect approached and opened the driver's side door. He robbed the victim at gunpoint, taking his wallet and a military knapsack containing other personal effects.

Prosecutors say the victim got his own firearm from the car and confronted the suspect, leading to a brief exchange of shots before the suspect fled, dropping his weapon.

The suspect is described as an approximately 30-year-old man, who is about 5 feet, 10 inches tall. He had shoulder-length dreadlocks and was seen wearing a black-and-white shirt and jean shorts.

Anyone with information about the incident, is being urged to contact Detective Nora Berrio at 908-370-3016 or Dennis Donovan at 908-527-4558.

The offered reward is for information leading to an arrest and indictment.

The Associated Press wire services contributed to this report.