Published: Jul 09, 2010 11:46 AM EDT
Updated: Jul 09, 2010 8:47 AM EDT

OAKLAND, Calif. (AP) - Violent protests have led to scores of

arrests in Oakland, Calif.

The demonstrations follow a Los Angeles jury's conviction of a

white former transit officer of involuntary manslaughter in the

shooting of an unarmed black man in the back as he lay on the

ground on a train platform.

Prosecutors had wanted the former officer convicted of murdering

Oscar Grant, and yesterday's lesser verdict raised concerns of a

repeat of the rioting that followed the shooting on New Year's Day

in 2009. The trial was moved to Los Angeles following the riots.

Emotions ran high with about 500 people marching in the street

yesterday as police in riot gear had maintained a watchful eye.

Members of a crowd near City Hall moaned and cursed when they heard

the verdict.

Sporadic violence later broke out and police said they made 83

arrests throughout the night for violations that included failure

to disperse, vandalism and assaulting a police officer.