An overpass carrying a subway train collapsed in Mexico City late Monday, killing at least 24 people and injuring more than 70, according to local government officials.

The train was traveling on an elevated and outdoor portion of the newest Line 12, also known as the Golden Line, when a portion of the overpass collapsed, Mexico's Secretariat of Risk Management and Civil Protection said.

The incident happened at 10:25 p.m. local time, according to Mexico City's Interior Minister Alfonso Suarez Del Real.

International engineering experts will be called in to help determine the cause of the collapse, which the country's foreign minister, Marcelo Ebrard, called "the most terrible accident we've ever had in the public transport system."

The collapse happened near Olivos Station at 10:25 p.m. on Monday, according to Mexico City's Interior Minister Alfonso Suarez Del Real.
The collapse happened near Olivos Station at 10:25 p.m. on Monday, according to Mexico City's Interior Minister Alfonso Suarez Del Real.
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Relatives of victims arrive at the site on Tuesday.
Relatives of victims arrive at the site on Tuesday.
Henry Romero/Reuters
A man works in the area of the collapse on Tuesday.
A man works in the area of the collapse on Tuesday.
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Firefighters work to lower a subway car that was dangling from the elevated overpass.
Firefighters work to lower a subway car that was dangling from the elevated overpass.
Fernando Llano/AP
Emergency workers move an injured person on a stretcher.
Emergency workers move an injured person on a stretcher.
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Emergency personnel work at the site from inside a metro car.
Emergency personnel work at the site from inside a metro car.
Luis Cortes/Reuters
Rescue workers stand at the scene of the collapse.
Rescue workers stand at the scene of the collapse.
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Rescue efforts were temporarily suspended Monday night due to concerns over a subway car dangling over the road.
Rescue efforts were temporarily suspended Monday night due to concerns over a subway car dangling over the road.
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A rescue worker stands in front of a car that was trapped under the collapsed overpass.
A rescue worker stands in front of a car that was trapped under the collapsed overpass.
Luis Cortes/Reuters
Rescuers work at the site on Monday night.
Rescuers work at the site on Monday night.
Luis Cortes/Reuters
Members of the Mexican Red Cross transport an injured person on a stretcher.
Members of the Mexican Red Cross transport an injured person on a stretcher.
Alfredo Estrella/AFP/Getty Images
Rescuers work at the scene of the collapse.
Rescuers work at the scene of the collapse.
Luis Cortes/Reuters
Mexico City's metro system is one of the busiest in the world. Line 12, where the accident happened, opened in 2012.
Mexico City's metro system is one of the busiest in the world. Line 12, where the accident happened, opened in 2012.
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Members of a rescue team carry a victim's body.
Members of a rescue team carry a victim's body.
Henry Romero/Reuters
Soldiers hold stretchers as they wait to help in the rescue efforts.
Soldiers hold stretchers as they wait to help in the rescue efforts.
Marco Ugarte/AP