BBC- A strong earthquake has struck central Mexico, killing more than 100 people and toppling dozens of buildings in the capital, Mexico City.
Rescue workers are searching for survivors buried under rubble and officials warn the death toll may rise.
The 7.1 magnitude quake caused damage in Morelos and Puebla states and in Mexico State.
It struck while many people took part in an earthquake drill exactly 32 years after a quake killed thousands.
The country is prone to earthquakes and earlier this month an 8.1 magnitude tremor in the south left at least 90 dead.
The epicentre of the latest quake was next to Atencingo in Puebla state, about 120km (75 miles) from Mexico City, with a depth of 51km, the US Geological Survey said.
At least 54 people were killed in Morelos state alone, south of the capital, and 26 reported killed in Puebla state. Thirty are confirmed dead in Mexico City with another nine in Mexico State.
About two million people in the capital were without electricity and phone lines were down. Officials also warned residents not to smoke on the streets as gas mains could have been ruptured.
Mexico City Mayor Miguel Angel Mancera told TV network Televisa that rescue services were dealing with collapsed or badly damaged buildings at 44 locations.
The earthquake drill was being held in Mexico City on the 32nd anniversary of a quake that killed up to 10,000 people.
Earthquake alarms did sound, correspondents say, but some residents apparently thought they were part of the day of drills.