CHICAGO (AP) At least 13 people, including a 7-year-old girl at a family party and a teenage boy, were killed in Chicago over the Fourth of July weekend, police said. The 7-year-old girl was fatally shot in the head while standing on the sidewalk at her grandmother's house during a Fourth of July party around 7 p.m. in the Austin neighborhood, police said. Tonight, a 7-year-old girl in Austin joined a list of teenagers and children whose hopes and dreams were ended by the barrel of a gun, Mayor Lori Lightfoot said on Twitter late Saturday. The Chicago Sun-Times, citing police, said that seven of those injured in shootings were minors. In response to violence that has occurred since Memorial Day weekend, police said they would have 1,200 extra officers on the streets for this holiday weekend.