Two metro cars could still be seen hanging from the structure, above a busy Avenida Tláhuac highway in the southeast of the city, at about 10 p.m. Monday night, shortly after the tragic accident.

The dangling train cars and structure later collapsed completely.

One person trapped in a car underneath the wreckage was pulled out alive.

This was the deadliest incident in decades in Mexico City’s metro system, and Sheinbaum said that a full investigation will be conducted into the cause of the collapse.

It was the second major Metro disaster this year, following a fire at an electrical substation on Jan. 9 that killed a policewoman and injured at least six people.

Residents had reported cracks in the structure after the deadly September 2017 earthquake, although according to El Universal newspaper, transport authorities did make repairs in the following months.