LONDON: Oil prices rose sharply on Friday, and were on track for 10 percent weekly gains as investors weighed the prospect of a wider Middle East conflict disrupting crude flows after President Biden said the US was discussing an Israeli attack on Iranian oil facilities. Brent crude futures were up $1.09, or 1.4 percent, at $78.71 a barrel, as of 2:20 p.m Saudi time. US West Texas Intermediate crude futures were up $1.08, also 1.5 percent, at $74.79 a barrel.