KEY POINTS
  • A civil action lawsuit was filed against Chipotle on Tuesday evening in Delaware County in Ohio.
  • Plaintiff Filip Syzller is asking for $25,000 after he purchased three chicken tacos on July 29 from Chipotle and then started experiencing nausea, headaches and hot flashes, court papers reviewed by CNBC said.
  • "We have been working with local officials to investigate and will continue to do so," Chipotle told CNBC in a statement.
Diners eat at a Chipotle restaurant in Chicago.

Things keep getting worse for Chipotle Mexican Grill.

An Ohio man sued Chipotle on Tuesday as state health officials investigate a "possible foodborne illness outbreak" stemming from one of the burrito chain's locations in Powell, Ohio, according to the lawsuit obtained by CNBC. Local health officials have received more than 500 calls so far — reporting nausea, diarrhea and fever, among other symptoms, after eating at the restaurant.