Rescuers, firefighters, policemen, soldiers and volunteers search for survivors in a flattened building of a school where at least 21 children died and 30 are missing, in Mexico City after a strong quake hit central Mexico.

Rescuers, firefighters, policemen, soldiers and volunteers search for survivors in a flattened building in Mexico City after a strong quake hit central Mexico.

A soldier searches for survivors in a flattened building in Mexico City after a strong quake hit central Mexico.

A marine, a firefighter, a volunteer and a soldier work together in the removal of debris of a flattened building in Mexico City as the search for survivors continues a day after a strong quake hit central Mexico.