Iran should come to the negotiating table with world powers and Gulf countries to seek a new deal that would deescalate regional tensions and revive its economy, a senior United Arab Emirates official said on Sunday. Tensions in the Gulf have risen since attacks on oil tankers in a vital global shipping lane this summer, including off the UAE coast, and a major assault on energy facilities in Saudi Arabia. Washington has blamed Iran, which has denied being behind the attacks on global energy infrastructure.