U.N. Secretary General Ban Ki-moon is urging Iran to resume talks with Western nations that suspect it is working on a nuclear weapons program. Tehran insists that its atomic program is for peaceful purposes.

During a press briefing at the World Economic Forum in Davos, Switzerland, Mr.Ban said Iran has the responsibility to prove its case.

UN Chief: Iran Must Prove Nuclear Program Peaceful

"I'm deeply concerned by the report of the most recent IAEA, International Atomic Energy Agency, report indicating that there is a possibility of a military dimension in Iranian Nuclear Development Program of which they say is peaceful. Onus is on the Iranian side," said Ban.

UN Chief: Iran Must Prove Nuclear Program Peaceful

The U.N. chief says the only way to address the crisis peacefully is through dialogue.

UN Chief: Iran Must Prove Nuclear Program Peaceful

He added that Tehran must abide by the Security Council resolutions mandating that it proves the country's nuclear program is for peaceful purposes.