Mexico's civil protection agency said it was the strongest natural disaster to hit the country since a devastating 1985 tremor that toppled buildings and killed thousands. The Mexican states of Chiapas, Oaxaca and Tabasco confirmed a number of deaths in their regions. It was the biggest quake the country has experienced in more than 100 years, Mexico's president said. A massive quake hit off the coast of southern Mexico late Thursday night, causing buildings to sway violently and people to flee into o the streets in panic as far away as the capital city.
The USGS reported multiple aftershocks, including at least six measuring above a 5.0 in magnitude.
Two children were reported dead by The Associated Press in Tabasco, the state just north of Chiapas.
Mr Pena Nieto said a million people had initially been left without power, but 800,000 had now had it restored. The town of Juchitán in Oaxaca was one of the worst affected, with at least 17 deaths.
Chiapas Gov. Manuel Velasco told Foro TV that there have been reports of damage, including hospitals that have lost power and buildings with collapsed roofs, CNN reported. The U.S. Geological Survey reported the magnitude at 8.1, but other institutions rated it between 8.2 and 8.4.
People said the shock lasted for about dozens of seconds and the windows and beds in some buildings were shaking when the quake occurred.
At least one person was killed in Guatemala, its President said.