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U.S. crude oil prices rose sharply Friday as Iran escalated its attacks in the Strait of Hormuz this week and Ukraine vowed to keep striking Russian refineries.

U.S. West Texas Intermediate futures were up 2.9% to $100.78 per barrel. Brent crude, the international benchmark, was 3.3% higher at $109.37 per barrel.

At least nine commercial ships have come under attack this week in or near Hormuz. U.S. Central Command said an Iranian missile attack sank the container ship GFS Pride in the strait on Wednesday.

The “energy ceasefire” that President Donald Trump declared between Ukraine and Russia has quickly unraveled. Russia continued attacking Ukrainian infrastructure despite the supposed truce. President Volodymyr Zelenskyy said Ukraine would resume strikes on Russian refineries in retaliation.

U.S. commercial inventories also saw a big draw of more than 8 million barrels for the week ended Oct. 9 due to production shut-ins on the Gulf Coast from Hurricane Isaias, according to the Energy Information Administration.

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