At a meeting in Vienna, the United States has told Iran it would be happy to work with the country on a drug eradication program.

With relations fraught over Tehran's nuclear program, Washington agreed at the UN Commission on Narcotic Drugs meeting, to assist in tackling the global drug flow.

US envoy Glyn Davies said Tehran and Washington would try to work together on tackling the trafficking of drugs from Afghanistan.

Calling them areas of mutual cooperation and mutual support, he also said it was in the interests of the US to work with anti-drug agencies, even in a country which is currently being considered for US sanctions.

Washington and Tehran are locked in a bitter dispute over the Iranian nuclear program, which the West suspects is aimed at producing atomic weapons.

The US and Iran have had no diplomatic relations since the Islamic Revolution three decades ago.