Published: Jun 27, 2011 6:43 PM EDT
Updated: Jun 27, 2011 6:43 PM EDT

LOS ALAMOS, N.M. (AP) - Fire officials say that at least 30 structures, including an unspecified number of homes, have burned in a fast-growing wildfire south of New Mexico's Los Alamos nuclear lab.

Officials also said at a news conference that the 44,000-acre blaze, which started Sunday, has the potential to double or triple in size.

Los Alamos County fire chief Doug Tucker told reporters that at least 30 structures have burned in the Cochiti Mesa and Las Conchas areas. It wasn't clear how many were homes.

He says some residents were fled with nothing but their shirts on their back.

Tucker says the fire last night was the most active he has seen in his career, and he expects it will burn for a while.

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