Ahead of crucial talks in Istanbul, Iran has asserted its right to continue uranium enrichment, a stance that could intensify tensions with European powers. The meeting, involving Britain, France, Germany,

Germany, France and the United Kingdom will hold talks with Iran in Istanbul Friday, just days after the three European nations warned they would reimpose stiff sanctions on Tehran.

France, Britain and Germany will hold face-to-face talks with Iran on Friday for the first time since U.S. and Israeli strikes on Iranian nuclear sites in June, aiming to gauge Tehran's appetite for a compromise to avert sanctions,