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NJ town's evacuation expands after derailment

A containment boom floats in Mantua Creek Saturday, Dec. 1, 2012, near freight train tank cars that derailed Friday in Paulsboro, N.J. Residents in an area of about 12 blocks near the derailment remain out of their homes as officials continued their efforts to clear a hazardous gas that spewed from a ruptured freight train car. The precautionary evacuations were ordered late Friday, hours after a train derailment, and will likely remain in effect throughout the weekend and possibly longer. The order came after readings showed higher levels of vinyl chloride in the air. (AP Photo/Mel Evans)

PAULSBORO, N.J. (AP) -- More New Jersey residents are being ordered to leave their homes after a train derailment last week released a hazardous gas into the air.

But officials say that doubling the size of the evacuated area to include about 100 more homes means they can lift a shelter-in-place order that had covered the entire town of Paulsboro.

The evacuation order is expected to last until Sunday, a day longer than previously expected.

Paulsboro's schools are to remain closed.