Brent prices rose to their highest since May on Thursday after more Houthi attacks in Saudi Arabia stoked concerns over an escalation of the Middle East conflict and further disruptions to crude oil supplies from the world's key exporting region.Brent crude futures climbed $3.19, or 2.9%, to $112.01 a barrel by 1311 GMT. They hit $112.68 a barrel earlier in the session, the highest since May 18.US West Texas Intermediate crude gained $2.41, or 2.5%, to $99.56, after hitting $100.09 a barrel ea...