Coca Cola said the issue was identified “immediately” and that it had no impact on its products on sale.
In a statement, the company said: “Coca-Cola takes the safety and quality of our products extremely seriously.
“We are aware of an incident involving empty cans at our plant in Knockmore Hill, Lisburn. We are treating this matter extremely seriously and are conducting a thorough investigation in co-operation with the Police Service of Northern Ireland (PSNI).”
A PSNI spokesman said: “Detectives are investigating an incident at commercial premises in the Lisburn area following reports that a consignment of containers delivered to the premises had been contaminated. The investigation is at an early stage and there are no further details available at this time.”