Here are some more details on the expansion of U.S. sanctions against Russia:
U.S. Expands Russia Sanctions Over Ukraine Conflict
The United States has added 37 individuals and entities to its sanctions blacklist aimed at Russia over its continuing support for separatists in eastern Ukraine and the 2014 annexation of the Crimean Peninsula.
"Treasury stands with our partners in condemning Russia's violation of international law, and we will continue to sanction those who threaten Ukraine's peace, security, and sovereignty," John Smith, acting director of the Treasury's Office of Foreign Assets Control, said on September 1.
The United States blacklisted a number of Russian companies operating in Crimea, including construction firms Mostotrest and SGM-Most which helped to build a bridge from Russia to the peninsula, a statement said.
Six separatist representatives in eastern Ukraine and 11 officials in Crimea were also sanctioned.