Ukraine’s interim President Olexander Turchynov is due to form a unity government, days after the ousting of President Viktor Yanukovych.
Senior Western diplomats are continuing talks in Kiev with the interim leadership, while the US and UK are to discuss emergency financial assistance.
The US has yet to endorse the new leader, but says “Yanukovych is no longer actively leading the country”.
An arrest warrant has been issued for Yanukovych, who has disappeared.
Acting Interior Minister Arsen Avakov said a criminal case had been opened against the ousted president and other officials over “mass murder of peaceful citizens”.
Yanukovych was last reported seen on Sunday in Balaklava on the Crimean peninsula – an autonomous region where the majority of the population is ethnically Russian.