Latest Mexico quake spreads alarm, some rescue efforts suspended

By Noe Torres and Daniel TrottaMEXICO CITY (Reuters) - A magnitude 6.2 earthquake that shook southern Mexico on Saturday spread fear in the capital and frustrated rescuers, some of whom were forced to suspend the search for survivors of an earlier, bigger tremor.The United States Geological Survey said the new quake was relatively shallow with an epicenter near Juchitan, a tropical region of Oaxaca state hard hit by another major earthquake on Sept 7.In Mexico City, where the tremors were mild,