Oil prices finished higher on Friday, as ongoing tensions in the Middle East lent support while the gains were capped by concerns over a global crude surplus. The West Texas Intermediate for August delivery gained 0.01 U.S. dollar to settle at 60.21 dollars a barrel on the New York Mercantile Exchange, while Brent crude for September delivery climbed 0.20 dollar to close at 66.72 dollars a barrel on the London ICE Futures Exchange. Iran's Foreign Ministry urged Britain to release its oil tanker which Britain seized in the Strait of Gibraltar last week, official IRNA news agency reported on Friday. "The British claim ... (full story)