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PENSACOLA, Fla. (AP) — Officials say there has been an explosion at the Eglin Air Force Base in Florida.

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No injuries have been reported, but some areas inside and outside of the base have been evacuated.

Eglin officials said on their Twitter account Wednesday that the explosion happened at the McKinley Climatic Lab.

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They said a “shelter in place” order is in effect for part of the base, which is located outside Pensacola.

Officials say the source of the smoke has been identified as methyl chloride, and they are urging people to avoid contact with it.

No further details were immediately available.

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