Mexican authorities are investigating the cause of a train derailment in Oaxaca that killed 13 people and injured 98 others.The disaster occurred on the Interoceanic Corridor, a flagship infrastructure project inaugurated in 2023, as the train traveled between Salina Cruz and Coatzacoalcos.Claudia Sheinbaum confirmed the casualties while the Mexican Navy, which operates the line, identified an engine failure on a curve near Nizanda as the primary cause.