Agency urges response to 'credible' evidence of weapons research

Experts from the International Atomic Energy Agency were back in Teheran early on Wednesday to try to resolve long-running differences with Iran over its controversial nuclear program.

The eight-person team, led by Herman Nackaerts, the UN agency's chief atomic inspector and deputy director, was greeted at the airport by Iran's envoy to the IAEA, Ali Asghar Soltanieh, the ISNA News Agency reported.