Oil prices climbed above $100 a barrel on Monday as the US Navy prepared to block ships to and fromIran via the Strait of Hormuz, a move that could restrict Iranian oil exports, after Washington and Tehran failed to reach a deal to end the war. Brent crude futures rose $6.96, or 7.3%, to $102.16 a barrel by 0430 GMT after settling 0.75% lower on Friday. US West Texas Intermediate was up $8.1