Brent crude, the primary international benchmark, has dipped with investors eyeing potential US-Iran talks in Doha. As of 03:56 GMT, Brent August crude futures were down 0.9 percent or 64 cents, at $72.51 a barrel. 🔴 LIVE updates: https://t.co/zF54o7MbGQ https://t.co/J1MroTVCc9