MEXICO CITY (AP) – Officials say 24 people were killed when an elevated section of Mexico City’s metro collapsed as a train was traveling along it. Mayor Claudia Sheinbaum said the train fell onto a busy boulevard late Monday night. It was one of the deadliest incidents in the history of the subway system, which is among the busiest in the world. Of the 24 killed, the mayor said 21 died at the scene, while the others died at hospitals, and children were among the fatalities, Crews used a crane to lower a train car to the ground as they untangled the steel and concrete wreckage. Officials say 77 people were hospitalized.