The interim government in Ukraine has issued an arrest warrant for ousted president Viktor Yanukovych, accusing him and other officials of mass murder of protesters.
Acting interior minister Arsen Avakhov announced the warrant in a Facebook statement Monday. He said Mr. Yanukovych was last seen in the pro-Russian Crimea region of Ukraine, but that the ousted leader's exact whereabouts are not clear.
Russian Prime Minister Dmitry Medvedev on Monday questioned the legitimacy of Ukraine's new authorities, saying they had come to power in what "in its essence is the result of an armed mutiny."
Russia's Foreign Ministry charged that "dictatorial and sometimes terrorist methods" are being used in various regions of Ukraine to pressure those who disagree with the change in government.
On Sunday, Russia recalled its ambassador to Kyiv for consultations on what it described as the "deteriorating situation in Ukraine." A Russian Foreign Ministry statement cited a need for "a comprehensive analysis" of developments in Kyiv.
Mr. Medvedev said Monday that the ambassador was recalled because "there is a threat to our interests, to the lives and health of our people" in Ukraine.
The United States and Britain have warned Russia not to send forces into Ukraine. U.S. National Security Advisor Susan Rice said Russian military intervention would be a "grave mistake."
European Union foreign policy chief Catherine Ashton traveled Monday to Kyiv, where she met with Ukraine parliament speaker Oleksandr Turchynov, who was made the country's acting president Sunday. Ashton also met with political party leaders, including Vitali Klitschko and Arseniy Yatsenyuk.
Ashton's office said her trip to Kyiv would include discussing ways the EU can help the political and economic stabilization of Ukraine.
White House spokesman Jay Carney said Monday the United States is ready to provide financial support to Ukraine, to complement aid from the International Monetary Fund and help the country invest more in health and education.
U.S. Deputy Secretary of State William Burns will travel to Ukraine Tuesday. According to the State Department, he will meet with acting president Turchynov, as well as Yatsenyuk and members of parliament.
Burns "will urge the new government to take all steps necessary for free and fair presidential elections in May," the State Department said.
There is split support in Ukraine between those who want the country to favor relations with Europe and those who want closer ties with Russia. Ousted president Yanukovych backed out of a trade deal with the EU in November, setting off protests that led to him being kicked out of office.
In an address Sunday night, Mr. Turchynov stressed the plan to embrace the EU.
"Our priority is returning to the path of European integration where the fight for Maidan began. We have to return to a family of European countries and to understand the importance of relations with the Russian Federation and be ready to build relations on new and fair partnership of good neighborly relations."
He has promised a new government by Tuesday, and lawmakers have called for new elections on May 25.
Also Monday, the acting finance minister Yuri Kolobov said Ukraine will need $35 billion in foreign aid to cover its bills during the next two years. He called for an international donor conference and appealed for urgent aid, saying some of the money needs to come within two weeks.
Jonathan Adelman, a Russian expert at the University of Denver's Korbel School of International Studies, told VOA that it would be logical for the country to split, but that is not likely because both sides are convinced they can dominate the government.
"Those in eastern Ukraine are convinced that with the backing of Russia they can hold their position and dominate the whole country, which they did under Yanukovych. The people in west Ukraine, of course, were looking at the 2004 orange revolution because they were heavily influenced by the Poles and Lithuanians and by more western Europeans, and they're convinced that with Western help they can dominate it. So I think the probability of a split is very small; even though it would be very logical, very few people seem to want it."
Mr. Yanukovych fled Kyiv on Saturday for his support base in eastern Ukraine.
Opposition party leader Vitali Klitschko said Sunday the ousted leader should take full responsibility for the chaos in Kyiv that has resulted in the deaths of about 100 anti-government protesters in the past two weeks.
Mr. Yanukovych's party issued a statement blaming him for the surge of deadly violence that wracked the capital in recent weeks.
Ukrainian protesters took control of Mr. Yanukovych's offices in Kyiv on Saturday. Others let themselves onto the grounds of the president's lavish but secret estate outside Kyiv, which includes a private zoo, and they toured his house. Some say they are stunned that one person could have so much while others in Ukraine have nothing.