WASHINGTON, United States (AP) — President Joe Biden on Thursday ordered the release of 1 million barrels of oil per day from the nation’s strategic petroleum reserve for six months, a bid to control energy prices that have spiked after the United States and allies imposed steep sanctions on Russia over its invasion of Ukraine.

The president said it was not known how much gasoline prices could decline as a result of his move, but he suggested it might be “anything from 10 cents to 35 cents a gallon.” Gas is averaging about $4.23 a gallon, compared with $2.87 a year ago, according to AAA.

“The bottom line is if we want lower gas prices we need to have more oil supply right now,” Biden said. “This is a moment of consequence and peril for the world, and pain at the pump for American families.”

The president also wants Congress to impose financial penalties on oil and gas companies that lease public lands but are not producing. He said he will invoke the Defense Production Act to encourage the mining of critical minerals for batteries in electric vehicles, part of a broader push to shift toward cleaner energy sources and reduce the use of fossil fuels.

The actions show that oil remains a vulnerability for the US. Higher prices have hurt Biden’s approval domestically and added billions of oil-export dollars to the Russian government as it wages war on Ukraine.

Tapping the stockpile would create pressures that could reduce oil prices, though Biden has twice ordered releases from the reserves without causing a meaningful shift in oil markets. Biden said Thursday he expects gasoline prices could drop “fairly significantly.”