Iran has agreed to continue nuclear negotiations with European powers after a four-hour meeting in Istanbul, described by officials as 'serious, frank, and detailed.' The talks come amid heightened tensions following recent attacks on Iran's nuclear sites and as a United Nations resolution supporting the 2015 nuclear deal approaches expiration. Both sides discussed sanctions relief and the future of Iran's nuclear program, with further consultations planned. As deadlines loom, the possibility of renewed international inspections in Iran is being considered, while Iranian officials emphasize the national significance of their nuclear program.