Oil headed for weekly gains on Friday, as Houthi attacks on tankers in the Red Sea sparked worries about the closure of a second shipping chokepoint, while Kazakhstan temporarily cut output after its main export route was forced to shut.
Brent futures eased 72 cents, or 0.72%, to $99.97 a barrel as of 0126 GMT, but remained on course for a 13.5% advance this week. West Texas Intermediate (WTI) futures fell 70 cents, or 0.76%, to $91.49 a barrel, on track for a 10.9% weekly rise.
