Nightly News | April 20, 2013
>>> overseas, a race against time in china after a devastating earthquake killeded at least 157 people and injured more than 5700. it happened overnight in sichuan province where a massive quake struck five years ago. ian williams now with the latest from beijing.
>> reporter: the powerful 6.6 mag magnitude quake struck this morning. for a full min, it shook towns and villages . this in an area where memories are still raw of a devastating quake five years ago that killed more than 90,000 people. the government immediately dispatched thousands of soldiers and rescue workers to the scene. though many roads in this mountainous area were blocked. in villages near the epicenter, authorities said nearly all the buildings had collapsed. there were extraordinary scenes as rescue workers scrambled to free people trapped in the rubble. there were at least 700 aftershocks. excavators and heavy machinery are moving in, as well as tents, blankets and other emergency supplies. china's new prime minister has flown in to direct the operation. tonight, rescue workers are still struggling to reach the more remote areas of the quake and the number of casualties seems certain to rise. ian williams , nbc news, beijing.