Oil prices rallied nearly 3% to their highest in three months on Friday as traders braced for supply disruptions from the broadest U.S. sanctions package targeting Russian oil and gas revenue.

The U.S. Treasury Department is sanctioning Russian oil companies, tankers, officials and executives. Oil prices jumped on worries that crude supplies would face disruptions. Oil prices jumped more than 3% on Friday as the U.

Crude prices are having one of their best days in a year, rallying as much as 5% amid concerns that icy weather in the oil patch will crimp domestic supply, while tighter sanctions on Russia and Iran may eliminate barrels from global markets.