A Black man who was stopped on his bicycle for an alleged “vehicle code” violation was shot to death by two Los Angeles sheriff’s deputies, who fired 15 to 20 rounds after the man punched one officer and dropped a pistol on the ground, authorities said on Tuesday, September 1, Reuters reports.

A semiautomatic handgun apparently fell from a bundle of clothes that the man, identified as Dijon Kizzee, 29, had been clutching and dropped when he struck an officer in the face, said Lieutenant Brandon Dean, a Los Angeles County sheriff’s spokesman.

Dean said the two officers opened fire when Kizzee made “a motion that he’s going to pick up the firearm.”

“Whether the firearm was actually in his hand, if he was motioning towards it, I don’t have those specifics because we haven’t interviewed the actual deputies who were there yet,” Dean said.

Initial news of Monday afternoon’s shooting drew scores of angry demonstrators to the scene of the Westmont community on the southern edge of Los Angeles, becoming the latest flashpoint in a summer of protests over African-Americans killed at the hands of police.

A protest march was organized for Tuesday evening by local activists from the Coalition for Community Control Over the Police.