At least 24 dead in one of Mexico City's worst metro train disasters
Several minors killed
Mexico City Mayor Claudia Sheinbaum told reporters that several minors were amongst the 24 fatalities.
About 80 other people were hospitalised for treatment.
Overpass collapsed
CCTV footage showed the overpass collapsing as a train was approaching it, which caused clouds of debris and sparks.
It occurred near the Olivos station on Monday night.
Victims still trapped
Emergency services were working to rescue the passengers who are still trapped in the wreckage of the carriages.
The rescue operation had to be suspended briefly during the night over fears the wreckage was too unstable.
Later, the operation restarted with the help of a crane.
Carriages seen hanging
Carriages were seen hanging in a tangle of twisted cables in shocking images.
President says 'thorough investigation' to be carried out
"A thorough investigation will be carried out... to know the truth," President Andres Manuel Lopez Obrador, said, adding that independent experts from abroad would be called in for probe.
Questions raised
Concerns over potential structural failures had been raised since the line was started in 2012.
A study also mentioned problems related to the design, operation and maintenance of the track.
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