A police agent stands guard near packets of cocaine hydrochloride seized during an operation in the township of Turbo, Antioquia department, Colombia, on April 20, 2013. (Xinhua/Jhon Paz)

A police agent stands guard near packets of cocaine hydrochloride seized during an operation in the township of Turbo, Antioquia department, Colombia, on April 20, 2013. (Xinhua/Jhon Paz)

 A police agent stands guard near packets of cocaine hydrochloride seized during an operation in the township of Turbo, Antioquia department, Colombia, on April 20, 2013. (Xinhua/Jhon Paz)

Police agents pick up packets of cocaine hydrochloride seized during an operation in the township of Turbo, Antioquia department, Colombia, on April 20, 2013. (Xinhua/Jhon Paz)