Published: Jul 01, 2011 4:47 PM EDT
Updated: Jul 01, 2011 3:50 PM EDT

LOS ALAMOS, N.M. (AP) - The wildfire burning near the Los Alamos National Laboratory in New Mexico has grown to nearly 100,000 acres.

About 1,000 firefighters are battling the blaze, but the area is wooded and dry, providing plenty of fuel for the fire to take off on spot runs. Crews have been lighting back fires to reduce the available fuel and they also coated a canyon slope with a thick line of fire retardant foam.

So far, the U.S. Forest Service says the fire is only 3 percent contained.

Still, fire officials have been expressing confidence that they can keep the flames away from the Los Alamos nuclear lab and an evacuated town nearby. The Department of Energy's site manager says the fire poses only a "limited" threat to the radioactive waste stored at the site.

The wildfire started Sunday and the cause has not been determined.

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