Oil prices ticked up on Thursday, as markets worried about a supply shortage after Saudi Arabia and Russia extended their voluntary supply cuts to the end of the year.
Brent crude futures rose by 17 cents, or 0.2%, to $90.21 a barrel at 00:08 GMT. It crossed the $90 mark for the first time since November on Tuesday in the sixth straight day of gains.
U.S. West Texas Intermediate crude (WTI) futures gained 23 cents, or 0.3%, to $86.92 a barrel after touching a 10-month high in the previous session.
