Iranian and European delegations will gather in Istanbul, Turkey, on Friday for fresh talks on Tehran's nuclear program.

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.

Britain and Australia have announced they will sign a cooperation treaty to build Australian nuclear-powered submarines

Australia and the UK will hold talks between their foreign and defense ministers in Sydney on Friday, with the aim of signing a £20 billion ($27 billion) “treaty” to help build nuclear-powered submarines.