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Gas pipeline in San Bruno fire had defects

Homes are being destroyed as a massive fire roars through a residential neighborhood in a south San Francisco suburb.

January 21, 2011 12:00:00 AM PST
The gas pipeline that triggered the devastating explosion and fire in San Bruno had many defective welds.

That's according to a preliminary report Friday from federal investigators. The blast killed eight people and destroyed 38 homes.

The National Transportation Safety Board found over a hundred examples of incomplete or cracked welds that did not meet the 1956 standards when the pipe was installed.

The government has not yet determined the cause of the blast.