A man in Colorado was hospitalized after eating a Taco Bell meal that allegedly contained rat poison, authorities said.

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Authorities are still working to confirm if the man ingested rat poison – and, if so, whether or not the rat poison was put into his food at the restaurant.

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The man, who has not been publicly identified, went to a Taco Bell in Aurora Sunday afternoon, Bartmann explained.

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Officers responded to a verbal disturbance call at the restaurant's drive-thru at around 1 p.m., after the man argued with employees

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The man asked for a free food replacement instead of the drink. He was given an additional burrito at no cost, restaurant manager Lary Swift told CBS Colorado.

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"When we got (to the Taco Bell), there was... no criminal activity whatsoever. Just a customer unhappy, arguing with employees,"

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But later, the sheriff's office dispatch received a call from an area hospital at around 7:50 p.m. that evening.

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The hospital said that they had a male patient who had "possibly ingested rat poison," Bartmann said.

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Deputies who responded to the scene found that the patient was the same man from the earlier incident at Taco Bell.

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He "immediately felt a burning sensation and then started to get sick," Bartmann said, adding that the man then called 911 and was soon transported to a hospital.

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