WASHINGTON (AP) — President Joe Biden is preparing to order the release of up to 1 million barrels of oil per day from the nation’s strategic petroleum reserve, according to two people familiar with the decision, in a bid to control energy prices that have spiked as the U.S. and allies have imposed steep sanctions on Russia over its invasion of Ukraine.

The announcement could come as soon as Thursday, when the White House says Biden is planning to deliver remarks on his administration’s plans to combat rising gas prices. The duration of the release hasn’t been finalized but could last for several months. The people spoke on the condition of anonymity to preview the decision.

High oil prices have not coaxed more production, creating a challenge for Biden. The Democratic president has seen his popularity sink as inflation reached a 40-year high in February and the cost of petroleum and gasoline climbed after Russia invaded Ukraine.

The markets reacted quickly to the likely release from the strategic reserve with crude oil prices dropping 6% on Thursday morning to roughly $101 a barrel. Still, oil is up from roughly $60 a year ago as supplies have not kept up with demand as the world economy began to rebound from the coronavirus pandemic.

Americans on average use about 21 million barrels of oil daily, with about 40% of the consumption devoted to gasoline, according to the U.S. Energy Information Administration.

Domestic oil production is equal to more than half of the country’s usage, but high prices have not led companies to return to their pre-pandemic levels of output. The U.S. is producing on average 11.7 million barrels daily, down from 13 million barrels in early 2020.

Oil producers have been more focused on meeting the needs of investors than consumers, according to a survey released last week by the Dallas Federal Reserve. About 59% of the executives surveyed said investor pressure to preserve “capital discipline” amid high prices was the reason they weren’t pumping more, while fewer than 10% blamed government regulation.

The steady release from the reserves would be a meaningful sum and come near to closing the domestic production gap relative to February 2020, before the coronavirus caused a steep decline in oil output.

The Biden administration in November announced the release of 50 million barrels from the strategic reserve in coordination with other countries. And after the Russia-Ukraine war began, the U.S. and 30 other countries agreed to an additional release of 60 million barrels from reserves, with half of the total coming from the U.S.

According to the Department of Energy, which manages it, more than 568 million barrels of oil were held in the reserve as of March 25.

News of the administration’s planning was first reported by Bloomberg.

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Associated Press writer Michael Balsamo contributed to this report.