HIGH ISLAND, Texas (AP) -- Firefighters have contained a grass fire that spread over about 5,000 acres of a federal wildlife refuge marshland along the upper Texas Gulf Coast.

Denise Ruffino at the U.S. Fish and Wildlife Service s McFaddin Wildlife Refuge said high humidity and heavy dew overnight into Saturday should leave only some smoldering spots and reduce smoke that brought a haze to areas of Houston.

No injuries and no evacuations were reported after fire was noticed late Thursday. The refuge covers nearly 60,000 acres of marshland near the southeast corner of Texas along the Gulf of Mexico.

The cause of the fire is under investigation.

The refuge, established in 1980, is home to the largest concentration of alligators in Texas.

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