NEARLY two and a half metric tons of marijuana were discovered by police in a cargo truck in the southern town of San Vito de Coto Brus last week, the Public Security Ministry announced.Agents of the Drug Control Police (PCD) discovered the 2,475 kilograms of packaged pot during a basic inspection of the truck’s cargo, which – aside from marijuana – was manure.The two suspects transporting the cargo, identified by police as having the last names of Palma and Mora, were released from custody Monday after a judge determined there was a lack of sufficient evidence proving they knew they were transporting illegal drugs, AlDía reported.