Oil prices rose on Friday as Yemen’s Houthi rebels launched another wave of attacks on Saudi Arabia, stoking concerns about further disruption to supplies from the Middle East. Brent, the benchmark for two thirds of the world's oil, was trading 1.1 per cent higher at $114.50 a barrel at 10.21am UAE time. West Texas Intermediate, the gauge that tracks US crude, climbed 1.3 per cent to $100.80 a barrel.