A violent drug cartel is suspected of leaving a severed human leg found hanging from a pedestrian bridge Wednesday in Toluca, just west of Mexico City. At the bridge, the trunk of the body was left on the street below, near the city's center, along with handwritten signs signed by the Familia Michoacana cartel. Last week, threatening banners were left in another suburb of Toluca, and they were also signed by the Familia Michoacana. The Familia Michoacana has become known for carrying out ruthless, bloody ambushes of police in Mexico State and local residents in Guerrero. Last year, the U.S. Treasury Department announced sanctions on the Familia Michoacana cartel, which it accused of manufacturing "rainbow" fentanyl pills purportedly aimed at children.