A grass fire along Interstate 25 south of Cheyenne kept area fire crews busy Friday.

Cheyenne Fire and Rescue Chief Jim Martin says firefighters were called to the 4300 block of Clear Creek Parkway around 11:30 a.m. and had the fire under control by 12:20 p.m.

The fire burned 40 to 60 acres between Clear Creek Parkway and Berwick Road, but Martin says no structures were lost and no injuries were reported.

The cause of the blaze is unknown.