Presidential and local elections are due to be held on May 25.
One candidate has already been announced. Opposition leader and former heavyweight boxing champion Vitali Klitschko, of the UDAR party, will run for the presidency, his press secretary Oksana Zinovyeva said.
Elite riot police disbanded
Earlier Wednesday, acting Interior Minister Arsen Avakov announced that a riot police force used against anti-government protesters in Ukraine had been disbanded.
Demonstrators accused the elite Berkut force, deployed by the government of Yanukovych to quell recent protests, of using excessive force.
Avakov said on his Facebook page that he'd signed the order disbanding the force Tuesday.
But the new, pro-Russian mayor of Sevastopol said Tuesday night at a rally in the city that he had secured funding to keep paying Berkut riot police there even after the force was disbanded.
The mayor, Alexej Chaliy, was elected in an unofficial local vote, but the interim authorities in Kiev have said he is not a legitimate leader.
Last week, the bloody street clashes between demonstrators and security forces left more than 80 dead, the deadliest violence in the country since it gained independence when the Soviet Union collapsed 22 years ago.
Russia, which backed Yanukovych, contends that the President was driven out by an "armed mutiny" of extremists and terrorists. A warrant has been issued for his arrest, but his whereabouts remain unknown.
While Yanukovych is on the run, the diplomatic wheels have been set in motion within the international community.
One key concern is Ukraine's perilous financial position.
Interim Finance Minister Yury Kolobov proposed Monday that an international donor conference be held within two weeks. Ukraine, he said, will need $35 billion in foreign assistance by the end of 2015.
Russia had offered Ukraine a $15 billion loan and cut in natural gas prices in November, but that deal seems unlikely to remain on the table if Ukraine turns toward Europe.
UK Foreign Secretary William Hague tweeted Wednesday: "Will discuss international financial support for #Ukraine at the IMF in Washington DC today."
Ukrainian state news agency Ukrinform said the country has slashed its imports of natural gas from Russia in recent days.
A U.S. State Department spokeswoman on Wednesday stressed that no decision has been made about financial assistance.
"The United States is continuing to consider a range of options, including loan guarantees, to support Ukraine economically. But no decision has been made, and the next step is the formation of a multiparty, technical government.
"Once that government is formed, we will begin to take immediate steps, in coordination with multilateral and bilateral partners, that could compliment an IMF package, to support Ukraine," said spokeswoman Jen Psaki.