Oil prices fell on Wednesday after an unexpected build in US crude inventories, while investors assessed supply risks after Saudi Arabia suspended oil loadings at its Yanbu port following an attack on its East-West pipeline to the Red Sea. Brent crude futures fell 93 cents, or 0.86%, to $107.82 a barrel at 0028 GMT, while US West Texas Intermediate futures were down 97 cents, or 0.92%, at $10