Mario Guzman / EPA
Firemen remove glass from a broken window after a 7.6 earthquake in Mexico City, Mexico on March, 20, 2012. The earthquake affected Guerrero and Oaxaca states, authorities have reported three aftershocks.
Alexandre Meneghini / AP
Residents of the Roma neighborhood stand outside their homes after an earthquake was felt in Mexico City on Tuesday.
By msnbc.com staff and news services:
A strong, long 7.4 earthquake with an epicenter in Guerrero state shook central southern Mexico on Tuesday, swaying buildings in Mexico City and sending frightened workers and residents into the streets.
"I swear I never felt one so strong, I thought the building was going to collapse,'' said Sebastian Herrera, 42, a businessman from a neighborhood hit hard in Mexico's devastating 1985 earthquake, which killed thousands.