Oil prices jumped more than 2 percent on Wednesday after Russian President Vladimir Putin announced a partial military mobilization, escalating the war in Ukraine and raising fears of further oil and gas shortages.
Brent crude futures rose $2.28, or 2.5 percent, to $92.90 a barrel by 0707 GMT, after falling $1.38 on Tuesday.
US West Texas Intermediate crude futures rose $2.22, or 2.6 percent, to $86.16 a barrel.