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More than 400 acres burned Wednesday in a grass fire northwest of Manhattan.

Riley County Fire District No. 1 was dispatched around 3:30 p.m. to the 2500 block of Hidden Valley Road in the Keats area. Mutual aid was provided by Fort Riley and Manhattan Fire Departments and as of late last evening it was more than 70 percent contained. The cause of the fire is undetermined at this point.

Fire crews also contained a separate fire in the area of Baldwin Creek Road and Tuttle Creek Blvd Wednesday afternoon, the result of a rekindled brush pile.

Firefighters battled through wind gusts as high as 45 mph. A Wind Advisory remains in place area wide through 1 a.m. Friday.