Hundreds of kilos of cocaine were found in a shipping container at the Port of Philadelphia during a massive drug bust Tuesday morning.

The shipment was on board the MSC Desiree, a container ship that was traveling from Colombia to Europe, according to law enforcement sources.

The container was brought to the Port of Philadelphia on North Delaware Avenue. Multiple agencies, including Philadelphia Police, Pennsylvania State Police, Delaware State Police, Homeland Security, the DEA, the U.S. Coast Guard and Customs and Border Protection, inspected it around 10:30 a.m. Tuesday and found at least 537 kilograms of cocaine with a street value of at least $15 million.

Investigators are still counting the shipment and aren't expected to release the final number until Wednesday.

The case was turned over to Homeland Security Investigations.