Two tonnes of the drug was wrapped in plastic, in a shape designed to look like people, then placed on the seats. But it was discovered on board a US-bound bus stopped by security agents in the Mexican state of Baja California, according to the Lindero Norte news blog. The bus had apparently been escorted by a Federal Police patrol which, its driver claimed, had helped him get through several military and police checkpoints. But the federal policemen insisted they had nothing to do with trafficking, saying they were on a "surveillance mission", reports El Universal