Oman’s foreign minister arrived in Tehran on Wednesday for talks with his Iranian counterpart, state media reported, as nuclear talks between Iran and world powers continue in Vienna. Iranian Foreign Minister Hossein Amirabdollahian welcomed Sayyid Badr Albusaidi upon his arrival, with the visit scheduled to focus on bilateral and international affairs, the IRNA news agency said. Speaking at a joint briefing with his Omani counterpart, Amirabdollahian said there are still a few “extremely important issues in the negotiations in Vienna”. Oman has often acted as a go-between to help facilitate b…