The U.N. nuclear agency and Iranian officials have concluded two days of talks in Tehran about allegations that Iran has studied the design of nuclear weapons.

Neither party immediately commented on the talks.

Iran's state news agency, IRNA, said the International Atomic Energy Agency's deputy chief, Ollie Heinonen, met with Iran's envoy to the IAEA, Ali Asghar Soltanieh, and the deputy head of Iran's Atomic Energy Organization, Mohammad Saeedi, for a second day Tuesday.

On Monday, IRNA quoted an unnamed official as saying Heinonen's visit is aimed at developing cooperation between Iran and the IAEA. Another source told IRNA that Heinonen and his delegation will not inspect Iran's nuclear facilities during this visit.

In February, Heinonen presented evidence at IAEA headquarters in Vienna suggesting Iran had been studying how to use its nuclear technology to make a warhead.

The United States and its Western allies accuse Iran of working to develop nuclear weapons. Iran says its atomic program is for peaceful purposes.

Some information for this report was provided by AFP.