European and Iranian diplomats have arrived in Istanbul in a renewed effort to resolve the standoff over Tehran's nuclear program. The talks mark the first formal engagement since June's 12-day war between Iran and Israel, a conflict that included U.S. airstrikes on Iranian nuclear facilities and heightened tensions across the region.

Three European powers met with an Iranian minister to try to reopen negotiations over the limits of its nuclear activities.

Iran and European powers agree they need to hold another round of nuclear talks soon following discussions in Istanbul on Friday, said Iranian Deputy Foreign Minister Majid Takht-Ravanchi.