Brent crude futures jumped more than 5% on Thursday and are heading for their biggest weekly rise since early June

Oil prices surged on Thursday following the US announcement of sanctions on Russian oil majors Rosneft and Lukoil.

Global benchmark Brent crude futures up over 5% to $65.99 a barrel, while US West Texas Intermediate (WTI) rose 5.6% to $61.79 on Thursday.

While prices dipped slightly in early trading on Friday, both benchmarks remained on track for a 7% weekly gain - the biggest since early June.

The White House described the latest sanctions as a step to "encourage Moscow to agree to a ceasefire." Russia says it remains open to diplomacy but insists any peace deal must address the conflict's root causes. It has accused Kiev and its Western backers of refusing to negotiate in good faith and undermining peace efforts through sanctions.

Media reports citing trade sources said the sanctions prompted Chinese state oil majors to pause short-term Russian seaborne crude purchases. Industry sources alsowarnedthat refiners in India, the largest buyer of seaborne Russian oil, and Türkiye, the third largest, could reduce imports in the coming weeks.

"Flows to India are at risk in particular... challenges to Chinese refiners would be more muted, considering the diversification of crude sources and stock availability," Janiv Shah, vice president of oil markets analysis at Rystad Energy, told Reuters.

The measures are expected to ripple through the market as buyers of Russian crude seek alternatives until there is clarity on enforcement, Richard Bronze, head of geopolitics at Energy Aspects, told The Wall Street Journal. He predicted Brent could approach $70 a barrel in the coming days. "Just the decision to make this announcement is going to send quite a shock wave through the market," he said.

READ MORE: Trump hit Moscow but missed the point: What Russian analysts say about the new sanctions

Russia has long warned that the sanctions are illegal and are backfiring on those who impose them. Commenting on the new restrictions on Thursday, President Vladimir Putin called them an "unfriendly move" but said they would not significantly impact Russia's economy. He added that the sanctions were another attempt by Washington to pressure Moscow, stressing that "no self-respecting country ever does anything under pressure."

(RT.com)