US President Barack Obama said on Saturday leaders of the Group of Eight major economies are committed to continuing the current approach of sanctions, pressure and diplomatic discussions with Iran over its nuclear program.

"All of us are firmly committed to continuing with the approach of sanctions and pressure in combination with diplomatic discussions," he told reporters at the G8 meeting at the presidential retreat in Camp David.

"And our hope is that we can resolve this issue in a peaceful fashion that respects Iran's sovereignty and its rights in the international community, but also recognizes its responsibilities," he said.

Group of Eight leaders agreed in their initial discussions at Camp David on Friday that Iran needs to disclose more about its nuclear ambitions, a US official said.

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The Camp David summit comes days before the next round of Iran talks, to be held in Baghdad. The G8 leaders "affirmed the importance of having a uniform effort in approaching those Baghdad talks next week," the US official said.

"Each of the leaders noted the urgency for Iran to take concrete steps to assure the international community of the peaceful purpose of its (nuclear) program," the official said.

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