(260412) -- ISLAMABAD, April 12, 2026 (Xinhua) -- This photo taken on April 10, 2026 shows an exterior view of the Serena Hotel, a five-star property in the Red Zone, which has been reserved exclusively for the delegations from the United States and Iran in Islamabad, Pakistan. Negotiations between Iran and the United States in Islamabad, Pakistan, have concluded without an outcome as the U.S. "excessive demands" hindered a common framework and agreement, Iran's semi-official Tasnim news agency reported on Sunday. (Xinhua/Wang Shen)