US Secretary of State John Kerry says a free-trade agreement between the US and Europe is a priority for Washington. He was speaking after talks in Berlin. Kerry is on his first foreign tour as US Secretary of State.
The foreign ministers of Iran, the US, Britain, China, France and Germany are hoping to reach a framework nuclear deal with Tehran. The deadline ends at midnight on March 31.
After failing to meet a self-imposed deadline for a deal on Iran's nuclear program, negotiators have said there is much goodwill but differences remain. The atmosphere seems cautiously optimistic as talks continue.
World leaders are racing against the clock to finalize the details of a preliminary deal with Iran over its nuclear capabilities. Several issues still divide negotiators as Tuesday's deadline looms.
Tuesday's deadline for a nuclear deal in sight, US President Barack Obama and German Chancellor Angela Merkel have called upon Iran to make the necessary decisions. The two leaders spoke with each other by telephone.