Firefighters with the North Las Vegas Fire Department are at the scene of a fire at a former pig farm.

Firefighters say a pile of manure caught fire at the pig farm that used to be known as R.C. Farms which is located at 555 El Campo Grande Ave.  Heavy smoke could be seen moving north through out the area.

The smoke and odor were so bad residents were asked to stay in their homes for a short duration.  They have since been allowed to leave their homes.

The cause of the fire is unknown. North Las Vegas firefighters are expected to be at the scene for a while.