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The Biden administration has "deep concerns" about China’s "alignment" with Russia amid Moscow’s multi-front war against Ukraine, a senior administration official said Monday.

The official briefed reporters after White House national security adviser Jake Sullivan completed an "intense seven-hour session" in Rome, Italy, with the director of Chinese Foreign Affairs Commission Yang Jiechi Monday.

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"Mr. Sullivan raised a range of issues in U.S.-China relations, with substantial discussion of Russia's war against Ukraine," the White House said after the meeting. 

White House national security adviser Jake Sullivan speaks during a press briefing at the White House, Feb. 11, 2022, in Washington.

White House national security adviser Jake Sullivan speaks during a press briefing at the White House, Feb. 11, 2022, in Washington. (AP Photo/Manuel Balce Ceneta)

The meeting, which had been scheduled "quite some time ago" following President Biden and Chinese President Xi Jinping’s virtual meeting in November, came after U.S. intelligence officials said Russia asked China for military and economic aid following its invasion of Ukraine. In an attempt to protect intelligence sources, U.S. officials have been reluctant to detail what type of aid is being sought.

"We do have deep concerns about China’s alignment with Russia at this time, and the national security adviser was direct about those concerns and the potential implications and consequences of certain actions," the official said, without commenting directly to the reports that Russia had requested aid from China after invading Ukraine.

MOSCOW, RUSSIA - JUNE,5 (RUSSIA OUT) Chinese President Xi Jinping attends the extended meeting at the Grand Kremlin Palace in Moscow, Russia,, June,5, 2019. Chinese leader Xi Jinping is having a three-days state visit to Russia. Photo by Mikhail Svetlov/Getty Images ___ MOSCOW, RUSSIA - JUNE,5 (RUSSIA OUT) Russian President Vladimir Putin speeches during Russian-Chinese meeting at the Grand Kremlin Palace in Moscow, Russia,, June,5, 2019. Chinese leader Xi Jinping is having a three-days state visit to Russia.

Chinese President Xi Jinping attends the extended meeting at the Grand Kremlin Palace in Moscow, Russia, on June,5, 2019. (Mikhail Svetlov/Getty Images)

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The official, though, maintained that the Biden administration is "communicating directly and privately to China about our concerns about the kinds of support that other countries might be providing to Russia."

Sullivan, ahead of the meeting, warned that there "will absolutely be consequences for large-scale sanctions evasion efforts or support to Russia to backfill them."

"We will not allow that to go forward and allow there to be a lifeline to Russia from these economic sanctions from any country, anywhere in the world," Sullivan said.

Russian President Vladimir Putin shakes hands with his Chinese counterpart Xi Jinping at the Kremlin in Moscow, Russia, on June 5, 2019.

Russian President Vladimir Putin shakes hands with his Chinese counterpart Xi Jinping at the Kremlin in Moscow, Russia, on June 5, 2019. (REUTERS/Evgenia Novozhenina/Pool)

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Chinese leaders have declined to rebuke Putin for his invasion of Ukraine and have come out against Western economic sanctions. China has abstained in multiple United Nations votes from censuring Russia.

Meanwhile, the State Department on Monday said it is "watching very closely the extent the PRC provides any kind of support to Russia," noting that any kind of support "would be of great concern to us."