The U.S. announcement came shortly after the European Union announced travel bans and asset freezes on 21 people they have linked to the unrest in Crimea.
The sanctions were expected after residents in Crimea voted overwhelmingly Sunday in favor of the split. Crimea's parliament on Monday declared the region an independent state.
The United States, European Union and others say the action violates the Ukrainian constitution and international law and took place in the strategic peninsula under duress of Russian military intervention. Putin maintained that the vote was legal and consistent with the right of self-determination, according to the Kremlin.
Obama's order targets:
— Vladislav Surkov, a Putin aide
— Sergey Glazyev, a Putin adviser
— Leonid Slutsky, a state Duma deputy
— Andrei Klishas, member of the Council of Federation of the Federal Assembly of the Russian Federation
— Valentina Matviyenko, head of the Federation Council
— Dmitry Rogozin, deputy prime minister of the Russian Federation.
— Yelena Mizulina, a state Duma deputy
