At least 23 people died and dozens more were injured when an elevated segment on the Mexico City subway dropped from the southeast of the nation’s capital, inducing many train cars to dive in the street below.

Mexico City Mayor Claudia Sheinbaum said Tuesday the 79 individuals were taken to hospitals in which two later expired.

The collapse happened late Monday on Mexico City Metro’s Line 12, which opened in late 2012 and will be the most recent line in the machine , that is the 2nd greatest in the Spirit after New York, transporting some 4.5 million people per day. Part of this line is underground, and also yet another segment runs with an elevated railroad.

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Ms. Sheinbaum reported the collapse happened when a service column gave way, leaving the train divide in 2 and dangling precariously.