The Trump administration is prepared to allow Iran to have a civil nuclear program that relies exclusively on imported nuclear fuel, Secretary of State Marco Rubio said, outlining a possible compromise with Tehran aimed at preventing it from building a nuclear weapon.

However, Iran has already made clear that its right to enrich uranium is not negotiable. When asked about Rubio's comments, a senior Iranian official, close to Iran's negotiating team, again said on Wednesday "zero enrichment is unacceptable.