BROOMFIELD, Colo. (CBS4)– Fire crews battled a fire burning in a field along Interstate 25 and E-470 on Tuesday afternoon that created a lot of smoke.

Copter4 flew over the fire just before 4 p.m. on Tuesday where it was burning in a field. The flames were sending up a lot of black smoke.

Copter4 flew over a brush fire burning in a field along I-25 near E-470. (credit: CBS)

Copter4 flew over a brush fire burning in a field along I-25 near E-470. (credit: CBS)

Westminster and North Metro Fire Rescue crews were assisting Broomfield firefighters.

It is unclear how the fire started. It didn’t seem to be threatening any structures.

Copter4 flew over a fire burning at I-25 and E-470 on Tuesday (credit: CBS)

Copter4 flew over a fire burning at I-25 and E-470 on Tuesday (credit: CBS)

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