US Secretary of State Hillary Clinton warned Iran that time was not "infinite" for diplomacy and that "all options remain on the table" after a dispute over the venue of talks.
Clinton said that the European Union would look into setting a time and place for long-moribund talks on Iran's nuclear program but vowed that the United States would maintain "strong pressure" to address concerns.
"We want to see a peaceful resolution of the international community's concerns, but the time for diplomacy is not infinite and all options remain on the table to prevent Iran from acquiring a nuclear weapon," Clinton said.
U.S. navy says another aircraft carrier has arrived in the area of operation with accompanying warships.