U.S. Energy Secretary Rick Perry will meet his counterparts from Saudi Arabia and Russia starting on Monday, sources familiar with the matter said, as the Trump administration encourages oil-producing countries to keep output up two months before it is due to renew sanctions on Iran’s crude exports.

Reuters reports that Perry will meet Khalid al-Falih, Saudi Arabia’s energy minister, and other officials from the kingdom, the world’s largest oil exporter, in Washington on Monday morning, a U.S. government source said.

Perry, al-Falih and Darren Woods, the chief executive of ExxonMobil, were introduced on Saturday to the crowd at a Texas A&M University football game in College Station, Texas. All three attended at the university.

The U.S. energy secretary will also meet with Russian Energy Minister Alexander Novak on Thursday in Moscow, according to the U.S. source and a diplomatic source said.

Perry will be the most senior U.S. official to visit Russia since President Donald Trump met Russian President Vladimir Putin in Helsinki in July to try to improve ties that have dipped to a post-Cold War low.

Moscow and Washington are at odds over U.S. accusations of Russian meddling in U.S. politics, Syria, Ukraine and the poisoning of a former Russian spy in Britain.