Helicopters flew over downtown Mexico City and police patrols sounded their sirens.
The U.S. Geologic Survey said the quake hit at 10:29 a.m. (11:29 a.m. Eastern) along Mexico’s southern Pacific coast at a depth of 16 miles (26 km). The epicenter was 7 miles (12 km) south-southwest of Santa Maria Zapotitlan.
It was felt in Guatemala and throughout south and central Mexico.
This is a developing story and will be updated.