-- U.S. Secretary of State John Kerry arrived in Kyiv as U.S. officials announced Washington is preparing a $1 billion aid package for Ukraine.
-- Speaking at a press conference at his residence, Russian President Vladimir Putin has called the change of government in Ukraine an "unconstitutional overthrow and an armed seizure of power."
-- Putin also said there are no considerations to annex Crimea and no intentions to provoke separatist sentiment. He said it is up to the citizens of Crimea to determine their own future.
-- In Crimea, there are standoffs between Russian and Ukrainian troops in their bases, with conflicting reports of ultimatums given to Ukrainian troops to surrender that come and pass.
-- Russian Ambassador to the UN Vitaly Churkin has said that Ukraine's ousted President Viktor Yanukovych sent a letter to Russian President Vladimir Putin requesting that he use the Russian military to restore law and order in his country.
-- In eastern Ukraine, pro-Russian demonstrators have occupied part of the regional government building in the city of Donetsk. Meanwhile, a few hundred pro-Russian activists tried but failed to force their way into the regional administration building in the southern city of Odesa.
NOTE: Live blog updates are listed according to local time in Kyiv
Yulia Tymoshenko says she is not seeking prime-minister's post, according to AFP. Also, from the agencies:
Former Prime Minister Yulia Tymoshenko, freed from detention on Saturday, has spoken by telephone with German Chancellor Angela Merkel.
Tymoshenko's Batkivshchyna party said that in the phone call Sunday, Merkel congratulated Tymoshenko on her release.
It said the chancellor also "expressed the certainty" that Tymoshenko's return to political life would become "one of the main factors in stabilizing the situation in Ukraine," and also contribute to preserving the unity of Ukraine and helping it along the path to European reform.
Batkivshchyna said Tymoshenko and Merkel "agreed to a meeting that could take place very soon."
Tymoshenko also spoke by phone on Sunday with EU Enlargement Commissioner Stefan Fuele and U.S. Senators John McCain, Richard Durbin and Chris Murphy.
"As I was staying in hospital [eds. in Donetsk], I was informed that there was an alleged attempt on me, that somebody attacked me, that somebody shot at my car. This is all nonsense and lies. Never in my life have I been assaulted."
-- Volodymyr Rybak, whose resignation as parliamentary speaker was announced on Saturday, reacting to claims by ousted President Yanukovych that he had been beaten and shot at in Kyiv on Friday. Rybak's comments were made from Donetsk in a pre-recorded video aired by the pro-opposition Channel 5.
The BBC wraps up what Ukrainian media are saying about Tymoshenko. Views are mixed.
16:0823.2.2014
Ukraine's Channel 5 quoting the head of Maidan security, Andriy Parubiy, as saying it is "too early" to talk about protesters leaving Kyiv's Independence Square. He says all the Maidan's demands must be met, namely European integration and the punishment of those responsible for "giving and fulfilling criminal orders," and that parliamentary elections should be called.
16:3623.2.2014
Barack Obama's national security adviser, Susan Rice, said it would not be in the interest of Russia, Europe, or the United States to see Ukraine split apart. From the agencies:
Speaking on the NBC program "Meet the Press" on Sunday, Rice also said it would be a "grave mistake" for Russia to send military forces into Ukraine.
Rice, asked about a possible scenario in which Russia would its military into Ukraine to restore a government more friendly to Moscow, she said "That would be a grave mistake... It's in nobody's interest to see violence return and the situation escalate."
Rice's comments came after Ukraine's parliament appointed an interim president after impeaching pro-Russia President Viktor Yanukovych.
Yanukovych, whose whereabouts are unknown, has said he will not resign and that all decisions by parliament are illegal.
