Hong Kong/London (CNN Business) Oil prices moved higher Friday after a top Iranian general was killed in a US airstrike ordered by President Donald Trump.

Futures for Brent crude, a global benchmark, jumped 3.6% to settle at $68.60 per barrel on Friday. US oil futures gained 3.1%, settling at $63.05 per barrel. Both are on track for their biggest daily gains in about a month and their highest prices since September, when Iran attacked Saudi oil facilities.

Qasem Soleimani, commander of the Quds Force of Iran's Islamic Revolutionary Guards Corps, was killed in the strike at Baghdad International Airport.

The Pentagon said that Soleimani was "actively developing plans to attack American diplomats and service members" and that the strike was aimed at "deterring future Iranian attack plans."

The killing of the powerful Iranian general risks further escalating tensions in the Middle East, which is home to major oil producing countries and key energy supply routes.