A Coca-Cola factory in Northern Ireland halted production last week after human waste was discovered in its soda cans, The Guardian reported.

Now police are investigating how this could have happened at the Hellenic Bottling Company.

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The company said none of the contaminated products made it onto store shelves and they impounded the contaminated cans, according to The Guardian. They noticed the problem when machines at the plant became clogged.

“The problem was identified immediately through our robust quality procedures,” Coca-Cola said in a statement.

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"This is an isolated incident and does not affect any products currently on sale."

Read more at The Guardian.