Kellogg's has apologised after a Twitter user complained that the cartoon art found on one of its cereal boxes was 'racist'.

Saladin Ahmed, a Marvel comic writer, accused the cereal company of teaching racism, pointing out an illustration on a Corn Pop cereal box.

"Hey @KelloggsUS why is literally the only brown corn pop on the whole cereal box the janitor? this is teaching kids racism," he tweeted on Wednesday.

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Tweet may have been deleted

The illustration on the cereal box shows several yellow cartoon cereal pieces, all performing different activities, from juggling to bathing in a fountain.

One character, who appears to be dressed as a janitor waxing the floors, appears to be a darker shade than the others.

Kellogg's were quick to respond to Ahmed's tweet, apologising and saying that the artwork would be "updated and in stores soon."

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Tweet may have been deleted

Some online however, disagreed that the illustration was "racist."

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Tweet may have been deleted

Maybe he owns the place and taking care of business, or maybe he OWNS a cleaning company.Why diminish entrepreneurship? #makingupissues

— Deplorable Jen (@JenFL912) October 25, 2017

Perspective: janitor pop is only responsible one with a job who is also btw clothed and smiling. All the others look high and irresponsible

— Jerri Manthey (@jerrimanthey) October 25, 2017

And many even attacked Ahmed on Twitter, he said.

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Plenty were in support of Kellogg's changing its artwork, though.

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Tweet may have been deleted

The small things add up. This is wrong on so many levels. Glad you’re making it right.

— Avery (@IdFollowMe) October 26, 2017