Oil prices tumbled in early European trading as US President Donald Trump revealed that the likelihood of reaching a nuclear agreement with Iran is rising, with Iran agreeing to relevant terms.Brent crude futures for July delivery sagged 3.04% to US$64.09 per barrel, while New York crude futures of June delivery slid 3.21% to US$61.12 per barrel. Related NewsBuilding Permits MoM Prel for Apr in United States is -4.7%, lower than the previous value of 1.9%. The forecast was not available.