Unidentified gunmen have opened fire on mourners outside the site of a funeral held for a shooting victim in Miami, Florida, killing two and injuring 12, US police say. The men fled after shooting at a crowd of mourners attending the funeral of a 21-year-old man, himself the victim of a fatal shooting, police said on Saturday. "I was on my way out of the chapel when I heard the shots," said a pastor present at the service, adding, "I told people to look for cover. It was chaos.” According to the police, two men were killed in the incident while a 5-year-old girl was among the injured. In late February, a watch guard shot dead an unarmed 17-year-old African-American in Florida, in what has been described by human rights groups as a racially motivated attempt. The incident sparked public outcry and weeks of protests across the country.