U.S. Secretary of State John Kerry will visit Kiev on Tuesday to lend support to Ukraine's new interim leaders, officials said, adding that Russian forces now controlled the Crimean peninsula.
"In Kiev, on March 4, Secretary Kerry will meet with senior representatives of Ukraine's new government, leaders of the Rada [Ukraine's parliament], and members of civil society," State Department spokeswoman Jen Psaki said.
Kerry "will reaffirm the United States' strong support for Ukrainian sovereignty, independence, territorial integrity."
He will also stress "the right of the Ukrainian people to determine their own future, without outside interference or provocation," Psaki added in a statement.
The surprise stop was added atop a planned trip to Rome and Paris amid growing alarm at fast-moving events in Ukraine
On a conference call with reporters, senior administration officials repeatedly warned that Moscow risked a deepening fallout for sending its troops into southern Crimea.
Economic talks, including a visit by a Russian delegation to discuss energy, have already been canceled, and an upcoming major military event is also expected to be put on hold.
"We are also looking with allies and partners at a broad menu of options to curtail our economic and trade investment," a senior administration official said, adding that the US would likely "curtail normal activity that we have ongoing with Russia at this time."
The official said that Russian forces were "now in complete operational control of the Crimean peninsula."
"There is no question that they are in a occupation commission in Crimea. They are flying in reinforcements and they are settling in," the official said.
Victoria Nuland, Assistant Secretary of State for European and Eurasian Affairs, will travel to Vienna on Monday for talks with the Organization for Security and Cooperation in Europe.
She was hoping to look at ways to get international monitors into flashpoint areas and possibly "a broader mission to replace Russian forces if the Russians can be persuaded to pull back," the official said.
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