LENEXA, Kan. (AP) — Health officials are trying to determine what may have caused more than 20 people to become ill at a Lenexa restaurant.

LENEXA, Kan. (AP) — Health officials are trying to determine what may have caused more than 20 people to become ill at a Lenexa restaurant.

Twelve of 22 people who complained about illness Sunday night at the Mi Ranchito restaurant were taken to hospitals.

Dirk Fetterolf, EMS battalion chief for Johnson County Med-Act, says the customers complained of nausea, vomiting and dizziness.

A test determined that the restaurant's air quality did not cause the illnesses.

The restaurant is closed while the health department investigates. Other Mi Ranchito locations in the Kansas City metro area will stay open.

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Information from: The Kansas City Star, http://www.kcstar.com