The United States is expected to impose sanctions to punish Russia for the poisoning of Kremlin critic Alexei Navalny as early as Tuesday, two sources familiar with the matter said, writes Reuters.

The sources said on Monday on condition of anonymity that the United States was expected to act under two executive orders: 13661, which was issued after Russia’s invasion of Crimea but provides broad authority to target Russian officials, and 13382, issued in 2005 to combat the proliferation of weapons of mass destruction.

Both orders let the United States freeze the U.S. assets of those targeted and effectively bar U.S. companies and individuals from dealing with them.

The sources said the Joe Biden administration also planned to act under the U.S. Chemical and Biological Weapons Control and Warfare Elimination Act of 1991, which provides a menu of punitive measures.