The US Senate has backed legislation allowing President Barack Obama to extend sanctions against Iran.
The new sanctions would target those who export fuel to Iran.
In his first State of the Union address on Wednesday, Mr Obama warned Iran’s leaders of "growing consequences" over its nuclear programme.
The US and its allies fear Iran is attempting to develop nuclear weapons. Iran insists its nuclear programme is entirely peaceful.
The Senate bill targets non-Iranian companies that export fuel to Iran or help expand Tehran’s oil refining capacities by denying them US loans and other financial assistance.
Full Story: http://news.bbc.co.uk/2/hi/americas/8486441.stm