WEST HAVEN, Conn. (AP) – One Hell’s Angels motorcyclist was killed and another was injured Sunday when someone in a vehicle opened fire on them on Interstate 95, police said.

Roger Mariani, 60, of Stratford, was killed in the shooting, state police said. Mariani was affiliated with the Bridgeport chapter of the motorcycle club, said Connecticut State Police spokesman Sgt. J. Paul Vance.

The person or people responsible for the shootings were still being sought Sunday night.

Mariani was among a group of bikers who were riding southbound on the highway near Exit 42 in West Haven when the shooting occurred around 3:30 p.m., police said.

Police across the northeast were alerted to look for a green GMC sport-utility vehicle with Florida plates, and Vance said police believe four men were in the vehicle.

Police were considering a number of possible motives including road rage, Vance said. Specialists in gang activity also were called in to review the case.

Vance said police were looking for witnesses, and he urged anyone who witnessed the shooting or anything suspicious in the area Sunday to call police.

Mariani and Paul Carrol of Bridgeport were taken after the shooting to Yale-New Haven Hospital, where Carrol was treated and released, Vance said.

Members of the motorcycle club gathered at the hospital Sunday night, prompting New Haven police to station officers there to keep order. Police spokeswoman Bonnie Winchester said that no incidents were reported at the hospital Sunday night.

The Hell’s Angels Motorcycle Club is active in Connecticut with at least two chapters, the Nomads in Bridgeport and a Hartford-based group, according to its Web site.

The investigation snarled highway traffic for hours, bringing cars to a standstill on I-95 and the southbound side of I-91.

On the Web: www.hellsangelsct.com