A woman peers out from a home as Marines block off the area where the suspected leader of a drug gang and seven others were killed, according to the Navy, in southern Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo
Marines block a street where the suspected leader of a drug gang and seven others were killed, according to the Navy, in southern Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo
A commuter watches Marines block the area where the suspected leader of a drug gang and seven others were killed, according to the Navy, in southern Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo
Marines block access to the site where the suspected leader of a drug gang and seven others were killed, according to the Navy, in southern Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo
ADDS LOCATION - People watch security forces gather around the Nopalera metro station in the area where a suspected drug gang leader and seven others were killed earlier in the day, according to the Navy, in the Tlahuac neighborhood of Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo
Women make their way past police surrounding the Noplera metro after the suspected leader of a drug gang and seven others were killed, according to the Navy, in the Tlahuac neighborhood of Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo
Marines block the area where a suspected drug gang leader and seven others were killed, according to the Navy, in the Tlahuac neighborhood of Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo
A commuter watches Marines block the area where a suspected drug gang leader and seven others were killed, according to the Navy, in southern Mexico City, Thursday, July 20, 2017. In a statement Thursday, the Navy said a gang of street-level drug dealers operated in the Tlahuac and Iztapalapa districts on the city's south and east sides, where it dealt drugs, as well as carried out kidnappings, extortion and murder. Rebecca Blackwell AP Photo