Members of rescue teams search for survivors in the rubble of a collapsed building after an earthquake in Mexico City, Mexico September 23, 2017. (Reuters)

Rescue workers continue to search for survivors late into the night in Mexico City on September 22, 2017, three days after the powerful quake that hit central Mexico.
A powerful 7.1 earthquake shook Mexico City on Tuesday, causing panic among the megalopolis' 20 million inhabitants on the 32nd anniversary of a devastating 1985 quake. (AFP)

A female firefighter is carried out on a stretcher after spraining her ankle as rescue workers race against the clock to reach possible survivors trapped inside an office building in the Roma Norte neighborhood of Mexico City, in the early morning hours of Saturday, Sept. 23, 2017. A strong earthquake Tuesday toppled more than three dozen buildings in the capital, leaving dozens of people believed missing in this office building alone. (AP)

People sleep along the street next to a collapsed building as they wait for news of their loved ones after an earthquake in Mexico City, Mexico September 22, 2017. (Reuters)

Relatives speaks to the media next to a collapsed building as they wait for news of their loved ones after an earthquake in Mexico City, Mexico September 23, 2017. (Reuters)

Relatives speaks to the media next to a collapsed building as they wait for news of their loved ones after an earthquake in Mexico City, Mexico September 23, 2017. (Reuters)

Members of rescue teams search for survivors in the rubble of a collapsed building after an earthquake in Mexico City, Mexico September 22, 2017. Picture taken September 22, 2017. (Reuters)

Members of rescue teams search for survivors in the rubble of a collapsed building after an earthquake in Mexico City, Mexico September 22, 2017. Picture taken September 22, 2017 (Reuters)

Members of rescue teams search for survivors in the rubble of a collapsed building after an earthquake in Mexico City, Mexico September 23, 2017. (Reuters)

Members of rescue teams search for survivors in the rubble of a collapsed building after an earthquake in Mexico City, Mexico September 23, 2017 (Reuters)