A team of U.N. experts has returned from Tehran without agreement on a long-sought
deal that would restart its probe of suspicions that Tehran secretly worked on developing
nuclear arms. Iran denies such allegations, asserting that all its nuclear activities
are peaceful. It stopped answering questions about the allegations more than four
years ago, saying it had provided enough information. New attempts to restart the
investigation have dragged on for more than a year, with Tehran insisting on a detailed
outline of what U.N. experts of the International Atomic Energy Agency may or may
not do in their investigations. Team head Herman Nackaerts said Friday that ``differences
remain,'' and no deal was reached. He told reporters at Vienna airport that the two
sides will meet again in Tehran Feb. 12.