They are involved in various illicit activities, including human trafficking, drug trafficking and money laundering through casinos and construction projects. These groups often form alliances with local groups and cooperate with criminals in neighbouring countries. Cambodia is a significant transit point for drug trafficking, which is controlled almost exclusively by transnational organized crime groups that exert a substantial amount of economic power. Smaller criminal networks also operate in Cambodia, with involvement in human trafficking, human smuggling, wildlife trade and cyber-scams. Many of these networks pay tribute to local policing agencies and are said to be undisturbed, particularly in relation to illicit logging and wildlife trafficking.