HOUSTON:

Oil prices rose on Monday as investors assessed the impact of Ukrainian drone attacks on Russian refineries and of US President Donald Trump pressing NATO nations to halt Russian oil purchases. Brent crude futures rose 42 cents, or 0.63%, to $67.41 a barrel while US WTI crude was at $63.27 a barrel, up 58 cents or 0.93%.

Attacks on Russian oil infrastructure and mounting pressure from Trump on buyers of Russian crude were boosting oil prices on Monday, said Phil Flynn, senior analyst with Price Futures Group.

"Behind the scenes there are a lot of concerns around heavy oil and tight diesel supplies, keeping the market supported," Flynn added.

Ukraine launched a large attack with at least 361 drones targeting Russia overnight.

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