WAKEFIELD, Neb. (AP) — Four people have been treated for chemical exposure at a Michael Foods plant in northeast Nebraska.

The Dixon County Sheriff’s Office said in a news release that hazardous-materials teams and medics were sent to the Wakefield plant after a 911 call around 11:05 a.m. Wednesday. The four were taken to Providence Medical Center in Wayne. A hospital spokesman says they were treated and released.

The sheriff’s office says the chemical was contained inside the plant and says no evacuation was necessary outside the immediate area.

A Michael Foods spokesman didn’t immediately return a call Thursday from The Associated Press. The company’s based in Minnetonka, Minnesota.