A massive federal operation underway in Kansas City that targets violent crime has been largely welcomed by law enforcement and state officials, while being criticized by civil rights organizations and drawing concern Wednesday from Mayor Quinton Lucas.

The federal effort is dubbed Operation Legend after a 4-year-old boy named LeGend Taliferro, who was fatally shot while sleeping in his bed in Kansas City.

Under the effort, 225 federal agents from the FBI, the Drug Enforcement Administration, the U.S. Marshals Service and the Bureau of Alcohol, Tobacco, Firearms and Explosives joined 400 agents already working and living in the Kansas City area.