Published: Feb 23, 2011 7:59 PM EST
Updated: Feb 23, 2011 3:35 PM EST

CHRISTCHURCH, New Zealand- Hundreds of troops, police and emergency workers in Christchurch, New Zealand, are picking through the ruins of buildings brought down by yesterday's earthquake.

Sniffer dogs and heat-seeking cameras are being poked between gaps in hopes of finding more survivors. They're being joined by search teams from Australia, Asia, Britain and the United States.

More than 100 people have been rescued and some bodies have been located but not recovered. At least 75 people have been killed.

Officials believe around 300 people were trapped when buildings collapsed. About 25 people were in a seven-story concrete-and-glass building that houses businesses including a language school and TV operation. A police commander says the collapse was not survivable.

Police announced a nighttime curfew in a cordoned-off area of downtown. Some buildings are considered dangerous and some properties are vulnerable to crime.

Police say six people have been arrested since the quake for burglary and theft.

 (Copyright 2011 by The Associated Press. All Rights Reserved.)

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