(Fox News) A Chipotle restaurant in Ohio is facing a second lawsuit after 703 people reportedly fell ill after eating at the burrito chain.

The Powell location has shut down after facing complaints from sick customers since July 26, when the outbreak reportedly began.

Delaware County General Health District has been investigating the claims, testing customers for numerous foodborne illnesses like E. coli, salmonella, norovirus, and shigella — all of which came back negative, Dayton Daily News reported. The cause of the outbreak is currently unkown.

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