Brent and U.S. West Texas Intermediate crude oil prices rose more than $1 a barrel on Friday, as markets watched for signs of a direct conflict between Israel and Iran that could deepen supply shortages.
Brent crude rose 52 cents, or 0.57 percent, to settle at $91.17 a barrel. U.S. West Texas Intermediate crude rose 32 cents, or 0.37 percent, to $86.91 a barrel.
Both benchmarks settled at their highest levels since October on Thursday.
The two crudes ended the week's trading with gains exceeding four percent, continuing to rise for the second week in a row after Iran, the third largest producer in OPEC, vowed revenge on Israel after an attack that resulted in the killing of a number of senior Iranian military personnel.
Israel has not claimed responsibility for the attack on the Iranian embassy compound in Syria on Monday.
Data shows that Brent crude rose by 4.79 percent last week, while US West Texas Intermediate crude rose by 4.5 percent.
A NATO official said on Thursday that ongoing Ukrainian drone attacks on refineries in Russia may have knocked out more than 15 percent of Russia's production capacity, hurting the country's fuel production.
The Organization of the Petroleum Exporting Countries (OPEC) and its allies, led by Russia, within the framework of the OPEC+ alliance, last week kept their oil supply policy unchanged and pressured some countries to increase compliance with production cuts.
The US jobs report, on Friday, showed that the number of new jobs in March rose at a faster pace than expected, and also showed steady growth in wages.
The 303,000 jobs gain last month points to potentially strong demand for oil, but could delay an expected interest rate cut by the Federal Reserve later this year.
Global oil demand is expected to rise by 1.4 million barrels per day in the first quarter, analysts at JPMorgan said.
