The Mexican army said Wednesday that it has made a record seizure of opiates, about 3.6 metric tons of a dark liquid that contains heroin. A Mexican Defense Department press statement called it "the most important seizure of this drug in the history of the army and air force." The latest seizure was made when soldiers found dozens of large plastic containers with over 3,600 liters of the dark liquid on Feb. 1 during a raid on a drug lab in Coyuca de Catalan, a mountain town in the Pacific coast state of Guerrero, near the border with Michoacan, the department said Wednesday.