Washington, Aug 11 (EFE).- The FBI on Monday launched a parallel investigation into a fatal shooting by police in Ferguson, Missouri, where a vigil for the 18-year-old African American man who died in the incident degenerated into violence that led to 32 arrests.
The St. Louis County Police Department is conducting the primary investigation of Saturday's shooting.
Hundreds of people are continuing to protest peacefully on Monday in Ferguson over the death of Michael Brown.
The demonstrators, who chanted "No justice, no peace," demanded that the name of the police officer who fired the fatal shots be released.
County police spokesman Brian Schellman said that some 300 officers from various forces on Sunday night were dispatched to Ferguson when a vigil over the young man's death led to looting and arson.
Ferguson's mayor, James Knowles, welcomed the FBI's decision to conduct its own probe of the shooting.
Knowles mentioned social media as the explanation for the speed with which individuals more interested in looting than in the protest "infiltrated" the vigil.
Brown "physically assaulted" the officer who fired his weapon, St. Louis County Police Chief Jon Belmar said.
Brown, who was unarmed, fell dead on the street some 10 meters (yards) from a police car.
Two-thirds of Ferguson's roughly 21,000 residents are African American.
Hundreds of people gathered on Sunday night and while the majority prayed, some groups spread out, halted vehicle traffic and began looting.
Two hours later, authorities said, the protesters attacked several stores selling auto parts, shoes, cell phones, clothing and assorted other products.