SIOUX CITY, Iowa (KCAU) — Grass fires off Interstate 29 have been put out Friday afternoon.

The exact location of one fire was between I-29 and South Lewis Boulevard near the Sergeant Floyd Monument. Crews were called around 3:20 p.m. There was another further south. Crews from Sioux City and Sergeant Bluff responded to three separate fires.

Authorities told KCAU 9 the cause of the grass fires was due to sparks coming from the nearby railroad tracks.

The Iowa DOT stated on the 511 website stated that the roadways have been reoopened.

There was also a minor grass fire north of the intersection of South Lewis Boulevard and Singing Hills Boulevard.

There are several counties in Siouland under a Red Flag Warning.