Mexico City train accident kills at least 15

The metro's 12 line collapsed on top of cars on a road below.

Emergency medical crews and firefighters combing through the wreckage looking for survivors.

Mexico City Mayor Claudia Sheinbaum said 15 people were killed and that a car was trapped under the rubble.

The metro's 12 line was built when Foreign Minister Marcelo Ebrard was mayor of Mexico City.