A view shows the site of a deadly metro overpass accident that collapsed, after the Norwegian firm DNV delivered a final report on the causes of the collapse of the metro rail line that killed 26 people, in Mexico City, Mexico, on September 7, 2021. REUTERS/Edgard Garrido 

A man rides his bicycle near the site of a deadly metro overpass accident that collapsed, after the Norwegian firm DNV delivered a final report on the causes of the collapse of the metro rail line that killed 26 people, in Mexico City, Mexico, on September 7, 2021. REUTERS/Edgard Garrido 

A man walks near the site of a deadly metro overpass accident that collapsed, after the Norwegian firm DNV delivered a final report on the causes of the collapse of the metro rail line that killed 26 people, in Mexico City, Mexico, on September 7, 2021. REUTERS/Edgard Garrido 

A man walks near the site of a deadly metro overpass accident that collapsed, after the Norwegian firm DNV delivered a final report on the causes of the collapse of the metro rail line that killed 26 people, in Mexico City, Mexico, on September 7, 2021. REUTERS/Edgard Garrido 

Part of a rail is pictured at the site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 12, 2021. REUTERS/Edgard Garrido TPX IMAGES OF THE DAY 

A part of a rail is pictured at the site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 12, 2021. REUTERS/Edgard Garrido 

Part of a rail is pictured at the site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 12, 2021. REUTERS/Edgard Garrido 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 6, 2021. REUTERS/Edgard Garrido 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 6, 2021. REUTERS/Edgard Garrido 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 6, 2021. REUTERS/Edgard Garrido 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 6, 2021. REUTERS/Edgard Garrido 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

A view shows a part of the damage caused by an accident where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

Workers are seen at the accident site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

Workers walk at the accident site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

A man looks at the accident site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

A man rides his bicycle at the site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

A view shows the site where an overpass for a metro partially collapsed with train cars on it, in Mexico City, Mexico May 5, 2021. REUTERS/Henry Romero 

A public bus passes along the street after workers moved two train cars at the accident site, where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero 

Mexico City's Mayor Claudia Sheinbaum visits the site a day after an overpass for a metro partially collapsed with train cars on it, at Olivos station, in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

Mexico City's Mayor Claudia Sheinbaum visits the site a day after an overpass for a metro partially collapsed with train cars on it, at Olivos station, in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

Mexico City's Mayor Claudia Sheinbaum visits the site a day after an overpass for a metro partially collapsed with train cars on it, at Olivos station, in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

A person watches as workers move a train car from a site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

A police officer stands guard after workers moved two train cars at the accident site, where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero 

People hold a banner during a march to protest against the government after an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. The banner reads: "Punishment for the guilty". REUTERS/Luis Cortes 

People take part in a march to protest against the government after an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. One of the placards reads: "It was not an accident, it was the State." REUTERS/Luis Cortes 

People take part in a march to protest against the government after an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. One of the placards reads: "It was not an accident, it was the State." REUTERS/Luis Cortes 

Members of Aguilar family and relatives from one of the victims react outside the Prosecutor's Office in Iztapalapa neighbourhood, after the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

Jorge Hernandez speaks on the phone while waiting for news about his 28-year-old nephew Daniel, who had been seriously injured during the accident where an overpass of a metro partially collapsed with train cars on it, outside a hospital in Mexico City, Mexico May 4, 2021. REUTERS/Luis Cortes 

Jorge Hernandez gestures while waiting for news about his 28-year-old nephew Daniel, who had been seriously injured during the accident where an overpass of a metro partially collapsed with train cars on it, outside a hospital in Mexico City, Mexico May 4, 2021. REUTERS/Luis Cortes 

Investigators check the site of the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero 

Relatives of the victims react outside the Prosecutor's Office in Iztapalapa neighbourhood, after the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

Police officers holding shields walk near the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan 

A crane exits the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan 

Police officers stand guard and people look on at the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan 

Police officers stand guard and people look on at the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan 

Forensic workers look on as they walk into the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan 

A forensic worker enters the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan 

A woman shouts during a protest at the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan 

A woman gives police officers water at the site of an accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Toya Sarno Jordan TPX IMAGES OF THE DAY 

A funeral home vehicle leaves the Prosecutor's Office in Iztapalapa neighbourhood, after the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

A funeral home vehicle leaves the Prosecutor's Office in Iztapalapa neighbourhood, after the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

People carry the body of one of the victims to a vehicle, after the accident where an overpass of the metro partially collapsed with train cars on it, at the Prosecutor's Office in Iztapalapa neighbourhood, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

Relatives of the victims react outside the Prosecutor's Office in Iztapalapa neighbourhood, after the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

Relatives of the victims react outside the Prosecutor's Office in Iztapalapa neighbourhood, after the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

A person watches as workers move a train car from a site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

Relatives of the victims react outside the Prosecutor's Office in Iztapalapa neighbourhood, after the accident where an overpass of the metro partially collapsed with train cars on it, in Mexico City, Mexico May 4, 2021. REUTERS/Edgard Garrido 

People walk in front of a damaged train car near the site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

Workers cover a damaged train car after been moved from a site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

A damaged train car is seen after been moved from a site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

A soldier stands guard in front of the site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

Workers move a train car from a site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Carlos Jasso 

A resident reacts as she arrives at the site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero 

A resident reacts as she arrives at the site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero TPX IMAGES OF THE DAY 

Police officers and soldiers stand guard at the site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero 

Members of the Mexican National Guard stand guard as people look at the site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero 

Police officers stand at the site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero 

Workers move a train car from a site where an overpass for a metro partially collapsed with train cars on it at Olivos station in Mexico City, Mexico May 4, 2021. REUTERS/Henry Romero