2 new quakes shake southern Mexico, already coping with disasters

CNN)Two more earthquakes shook southern Mexico on Saturday, further rattling a country still coming to grips with the devastation from stronger temblors earlier this month.

A 6.1 magnitude earthquake Saturday morning was centered in Oaxaca state near Matias Romero, a town about 275 miles southeast of Mexico City, the US Geological Survey said. Roughly speaking, the epicenter was between the centers of this month's two more violent earthquakes -- the 7.1 magnitude temblor that hit Tuesday closer to the capital, and the 8.1 magnitude quake that struck September 8 off the southern Pacific coast, near Chiapas state.

People evacuate buildings in Mexico City's Tlatelolco area after a seismic alert sounded Saturday.

A 4.5 magnitude quake hit Oaxaca at 7:06 p.m. ET. That temblor occurred at a depth of 8.9 kilometers, according to initial readings by USGS.

In Oaxaca, some highways and a bridge that had been damaged during the September 8 earthquake collapsed, Mexico's federal police said.