Magnitude-6.6 earthquake shakes southern Mexico; no immediate reports of damage

MEXICO CITY (AP) -- A magnitude 6.6 earthquake shook southern Mexico on Tuesday, according to the U.S. Geological Survey, but there were no immediate reports of damage.

The quake gently swayed buildings in Mexico City and it was felt hundreds of miles to the east along the Gulf Coast, according to local radio stations.

The temblor struck at 6:50 a.m. (7:50 a.m. EST) and was centered in the region of Oaxaca, the USGS said.