Acting interior minister Arsen Avakov announced the warrant in a Facebook statement Monday. He said Yanukovych was last seen in the pro-Russian Crimea region of Ukraine, but the ousted leader's exact whereabouts are not clear.
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.
US official heading to Kyiv
U.S. Deputy Secretary of State William Burns will travel to Ukraine on Tuesday. According to the State Department, he will meet with Oleksandr Turchynov, who was speaker of Ukraine's parliament before being made the country's acting president Sunday, as well as opposition leader Arseniy Yatsenyuk and other 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.
In an address Sunday night, Turchynov spoke of the plan to move Ukraine closer toward Europe but also stressed the importance of good relations with Russia.
"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," said Turchynov.
He has promised a new government by Tuesday, and lawmakers have called for new presidential 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.
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.
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 Adviser Susan Rice said a Russian military intervention would be a "grave mistake." Britian’s Foreign Secretary William Hague has issued a similar warning to Russia.
Hague will travel to Washington later on Monday to discuss Ukraine with U.S. Secretary of State John Kerry and officials from International Monetary Fund.
Specter of a split
Ukraine’s crisis has brought to the forefront tensions between its traditionally more pro-Russian East and the country’s generally pro-European West. But observers are downplaying speculations that the rivalry may cause Ukraine to break up.
Jonathan Adelman, a Russian expert at the University of Denver's Korbel School of International Studies, told VOA that although some might jum to the conclusion that a split would be logical, in reality it's highly unlikely.
"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," said Adelman.
Members of self-defense units react after demolishing a fence enclosing the parliament building in Kyiv, Feb. 26, 2014.
A member of a self-defense unit saws a fence enclosing the parliament building in Kyiv, Feb. 26, 2014.
Anti-Yanukovych protesters march in the Independence Square, Kyiv, Feb. 26, 2014.
A woman cries at a memorial for the people killed in clashes with the police at Kyiv's Independence Square, Feb. 26, 2014.
An anti-Yanukovych protester cries near a memorial for the people killed in clashes in Kyiv's Independence Square, Feb. 25, 2014.
An anti-Yanukovych protester, wearing a Ukrainian flag with the name of his village written across it, places flowers at a memorial for the people killed in clashes in Kyiv's Independence Square, Feb. 25, 2014.
Flowers are seen placed at a barricade in Kyiv's Independence Square, Feb. 24, 2014.
People lay flowers at the barricades in memory of the victims of the recent clashes in central Kyiv, Feb. 24, 2014.
An opposition supporter cries near a memorial for the people killed in clashes with the police at Independence Square in Kyiv, Feb. 24, 2014.
Opposition supporters warm themselves around a fire as they guard one of the streets heading to Kyiv's Independence Square, Feb. 24, 2014.
Opposition supporters warm themselves around a fire in Kyiv's Independence Square, Feb. 24, 2014.
Some information for this report provided by Reuters
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.