The United States has called on Iran to consider positively a European Union plan aimed at resolving the dispute over the Islamic republic's nuclear program. State Department spokesman Thomas Casey voiced support Friday for the offer, which asks Iran to end uranium conversion and enrichment in exchange for political, technological and trade cooperation. Iran said it will issue a response to the offer soon. The EU deal also would allow Iran to continue developing civilian nuclear energy projects, if it promised not to seek atomic weapons. Washington has accused Iran of planning to build nuclear weapons, which Tehran denies. Also Friday, Mr. Casey warned Iran against ending a November agreement to freeze uranium conversion. Earlier this week, Tehran vowed to resume activities due to its frustration over nuclear talks with the EU.