REUTERS/Ajeng Dinar Ulfiana/Pool/File Photo Acquire Licensing RightsWASHINGTON, Sept 13 (Reuters) - The U.N. human rights expert for Myanmar on Wednesday called on the United States to further tighten sanctions on the country's military rulers to include their main revenue source, the state oil and gas enterprise. Andrews praised Washington for imposing sanctions on the Myanmar Foreign Trade Bank and Myanma Investment and Commercial Bank in June, but said more needed to be done. I urge the U.S. to join the European Union and immediately impose sanctions on the junta's single largest source of revenue, the Myanma Oil and Gas Enterprise," Andrews said. In January, the United States targeted the managing director and deputy managing director of the Myanma Oil and Gas Enterprise with sanctions, but has yet to go further against the firm, despite the urgings of rights groups and dissidents. Myanmar military officials have played down the impact of sanctions and say their air strikes target insurgents.

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Persons: Tom Andrews, Andrews, Congress's Tom Lantos, Washington, David Brunnstrom, Christopher Cushing Organizations: Association of Southeast Asian Nations, REUTERS, Rights, Myanmar, U.S . Congress, Myanmar Foreign Trade Bank, Myanma Investment, Commercial Bank, European Union, Gas Enterprise, United, Thomson Locations: Myanmar, Jakarta, Indonesia, United States, Washington, U.S, Bangladesh, Russia, China