The Springdale, Ark., food giant said no one was injured in the fire at the plant, which is in Holcomb, southwest Kansas, less than four hours northwest of Wichita.
Reuters reported on Sunday that the company couldn't yet say what caused the fire or how much damage it caused, although a company spokesman described it as "pretty big." Some 3,800 people work at the facility, Reuters reported.
The company's statement Monday said Tyson couldn't estimate how long the rebuilding would take at the plant, which is one of its six in the state. For now it will move the Holcomb production to alternative sites.
Staff at the plant might be called on "to help with cleanup and other projects, but regardless of the hours worked, all full-time active employees are guaranteed pay," Tyson said.
Tyson shares were trading off 0.2% at $88.24. The stock on Monday has traded down as much as 2.2% at $86.43 and up as much as 0.2% at $88.52.