(NEWSER)Â â€“ Vigils and protests for a black teenagerÂ shot dead in the street by police in St. Louis CountyÂ turned violent last night, with reports of looting, fires, and gunshots amid confrontations with police. Witnesses saw multiple stores being looted and police cars being vandalized, theÂ APÂ reports. Earlier, thousands of people had joined a candlelight vigil for 18-year-old Michael Brown, who was shot and killed Saturday afternoon in the St. Louis suburb of Ferguson. "Contributing to the unrest that is going on is not going to help," Ferguson's mayor tellsÂ KTVI. "We're only hurting ourselves, only hurting our community, hurting our neighbors. There's nothing productive from this."