In Pictures: The Deadly Earthquake That Just Rattled Mexico City

The new quake appeared to be unrelated to the magnitude 8.1 temblor that hit Sept. 7 off Mexico's southern coast and also was felt strongly in the capital. U.S. Geological Survey seismologist Paul Earle noted the epicenters of the two quakes were 400 miles (650 kilometers) apart and said most aftershocks are within (60 miles) 100 kilometers. PIC: Rescue work being undertaken. (AP).

A powerful earthquake shook central Mexico on Tuesday, collapsing buildings in plumes of dust and killing at least 149 people. Thousands fled into the streets in panic, and many stayed to help rescue those trapped. PIC: First responders work on removing the rubble of a collapsed building looking for survivors trapped underneath. (AP)