Medics are evacuated after an earthquake outside a private hospital in Mexico City, August 21, 2013. A magnitude 6.1 earthquake shook Mexico City on Wednesday, its epicenter located in the poor southern state of Guerrero, the United States Geological Survey (USGS) said, but there were no immediate reports of damage or injuries. REUTERS/Edgard Garrido (MEXICO - Tags: ENVIRONMENT SOCIETY)