A 21-year-old driver is accused of pointing a handgun at another driver during what police are calling a road-rage incident Thursday on Post Road East.

The confrontation took place about 5 p.m. as one driver, heading east near the road's intersection with Bulkley Avenue, was cut off by another driver, prompting the first motorist to flash his high-beam headlights at the offending vehicle, police said.

In response, the second driver -- identified by police as Tyler C. Keiser of Trumbull -- leapt out of his vehicle and brandished a black handgun at the other driver.The gun was not fired, police said. Keiser then drove off toward Fairfield, but not before the second driver recorded the license plate number of his vehicle.

A description of Keiser and his vehicle, along with its license plate number, were transmitted to Fairfield police, who shortly located the car on Pemburn Drive in that town. Keiser's car was searched by the Fairfield K-9, Ruger, and a small amount of marijuana was found, police said. Fairfield police issued Keiser an infraction for possession of less than four ounces of marijuana.

Westport police were called to the scene, where they said they found a black 9mm Glock semi-automatic handgun in Keiser's possession.

The gun was taken without incident from Keiser, who police said has a state permit to carry a handgun and the Glock is registered in his name.

Keiser was charged with second-degree threatening, second-degree reckless endangerment and second-degree breach of peace. He was released on $2,500 bond and is scheduled to appear March 8 in Norwalk Superior Court.