President Barack Obama on Thursday ordered the expulsion of 35 Russian suspected spies and imposed sanctions on two Russian intelligence agencies over their involvement in hacking U.S. political groups in the 2016 presidential election.
The measures, taken during the last days of Obama's presidency, mark a new post-Cold War low in U.S.-Russian ties, which have deteriorated over differences about Syria and Ukraine.
Allegations by U.S. intelligence agencies that Russian President Vladimir Putin personally directed efforts to intervene in the U.S. election process by hacking mostly Democrats have made relations even worse.
"These actions follow repeated private and public warnings that we have issued to the Russian government, and are a necessary and appropriate response to efforts to harm U.S. interests in violation of established international norms of behavior," Obama said in a statement from vacation in Hawaii.
"All Americans should be alarmed by Russia’s actions," he said.
It was not clear whether President-elect Donald Trump, who has repeatedly praised Putin and nominated people seen as friendly toward Moscow to senior administration posts, would seek to roll back the measures once he takes office on Jan. 20.
U.S. evicts Russians for spying, imposes sanctions after election hacks