Mexico promises answers after train collapse

Workers in Mexico City slowly hoisted one of two train cars dangling above the site of a collapsed railway overpass on Tuesday, using several tall cranes to clear the twisted metal that plunged onto a busy road below Monday night, killing at least 24 people and injuring 79, including children.

MEXICAN PRESIDENT ANDRES MANUEL LOPEZ OBRADOR (SPANISH): "The Mexican people must know the whole truth."

Mexican President Andres Manuel Lopez Obrador vowed that the government would find out who was responsible for the collapse of Mexico City's newest metro line.

The crash has raised questions about safety on one of the world's busiest metro systems, which serves an area that is home to more than 20 million people.

Four people who live in the area told Reuters they observed the beams below the elevated tracks visibly shaking when trains crossed.

The overpass was part of a railway line that was added to the network less than a decade ago and has been plagued by allegations of corruption.

In 2014, just two years after it opened, several of the line's stations were closed for repairs of structural problems.

The railway line was built by a consortium including a company controlled by the family of Mexican tycoon Carlos Slim and the Mexican unit of French train maker Alstom, which said on Tuesday that it would cooperate with and assist Mexican authorities in the investigation.