Peruvian authorities seized a record of more than six tons of cocaine from a Mexican cartel Tuesday, according to Bio Bio Chile.

The six tons reported on Wednesday accounts for only 85 percent of the total drugs found, Gen. Vicente Romero, head of the anti-drug police, told Bio Bio Chile.

The remaining to be tallied belong to the same shipment of coal where the drugs were found, hidden.

Authorities said the cocaine was hidden in half and 1kg packages in five underground tanks, among large lumps of coal, for several weeks. The investigation began six weeks ago.

The cocaine was supposed to be moved from the Peruvian city of Trujillo to the ports of Paita, which borders with Ecuador, and Callao in Lima. From there, the shipment was supposed to be sent to Spain and Belgium.

This large shipment that was building up is what tipped off authorities, since the large supply of coal was being sent to countries that historically have not bought that product, which launched the investigation, according to Bio Bio Chile.

Officials waited until the drugs were camouflaged in the shipments before raiding.

Romero told reporters the amount found so far is the largest ever recorded in Peruvian history and would serve as a large blow to the drug trafficking industry.

Peru has recently been identified as one of the largest producers of cocaine, at about 320 tons, second only to Colombia, according to the U.N., Bio Bio Chile reports.

In addition, Peru and Bolivia are the highest natural producers of the cocoa leaf, which is the raw material that is turned into cocaine.

Authorities have arrested two Mexicans and seven Peruvians, belonging to the Mexican cartel responsible for the drugs, but identities have not been released, nor the name of the cartel, according to Agence France-Presse.