Uruguay’s naval and customs officers have seized more about 4.4 tonnes of cocaine that were hidden in four soy flour containers in Montevideo port.
The authorities said the containers were destined for Lome, Togo.
The authorities confirmed that another 1.5 tonnes were later recovered from at a ranch. The seized drugs are estimated to be worth about $1.3bn (£1bn) in street value.
In November last year, the authorities seized about three tonnes of the drugs from a container in the same port that was enroute to Cotonou in Benin via the Spanish island of Tenerife.
Navy spokesman Diego Perona said the containers were due to be loaded on to an Italian-registered ship.
However, the origin of the massive amount of the bust was not immediately established.