MEXICO CITY (AP) — A gas tanker truck exploded and burned multiple vehicles under a Mexico City highway overpass Wednesday, killing three people and injuring 70 others, some with their entire bodies charred and others waiting for help in the road with burns and torn clothing.

The crash of the truck carrying more than 13,000 gallons (49,500 liters) of gasoline on a major highway sent flames and smoke billowing over the south of the capital.

Mayor Clara Brugada called the explosion an “emergency” that burned nearly 30 vehicles and left 19 of those injured in grave condition, including the driver of the truck. Among those injured were a baby and a 2-year-old child.

Brugada said prosecutors were investigating, but it appeared that the truck exploded after it tipped over on the highway.

“Th

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