Oil prices jumped $2 on Monday as Ukrainian forces dug in against heavy Russian attacks, while major oil producers reported they are struggling to produce their allotted quotas under a supply agreement.
Brent crude futures climbed $1.96, or 1.8%, to $109.89 a barrel at 0039 GMT, adding to a 1.2% rise last Friday.
U.S. West Texas Intermediate (WTI) crude futures rose $2.09, or 2%, to $106.79, extending a 1.7% jump last Friday.
