A gunman wearing a jogging suit and sun glasses and wielding two handguns fatally shot an honorary Turkish consul as he drove through this Boston suburb last night, police said.

About the time of the attack, an unidentified caller told the Associated Press bureau in Los Angeles that a group called the Justice Commandos for the Armenian Genocide claimed responsibility for the killing.

The consul was identified as Orhan R. Gunduz.

The attacker fled the scene and shed his outer garments, found with a .38-cal. pistol near the site of the shooting. Police also found a 9mm automatic handgun nearby.

Gunduz's blood-spattered body lay in his sedan an hour after the shooting as police cordoned off the area in a suburban square about 10 miles from midtown Boston. Police counted nine bullet holes in the windshield.

Meanwhile, a Los Angeles jury reported that it is deadlocked in the trial of a young Armenian charged with the 1980 firebombing of the Bel Air, Calif., home of a Turkish diplomat assassinated earlier this year. U.S. District Court Judge Terry Hatter Jr. told the jurors to resume deliberations today.

Harout Sassounian, 21, of Pasadena, denied charges he threw Molotov cocktails at Kemil Arikan's home.