Russia's lower house of parliament will issue a statement in support of Crimea's referendum results on Tuesday, the news agency Interfax cited a deputy speaker of the house as saying on Monday, Reuters reported.
"Tomorrow morning there will be a statement on Crimea," Interfax cited Deputy Speaker Ivan Melnikov as saying.
A Moscow-backed referendum in the southern Ukrainian region of Crimea on Sunday showed overwhelming support for joining the Russian Federation.
The vast majority of residents of Crimea - 96 percent - voted to secede from Ukraine and join Russia, in a referendum held March 16.
With the exception of Russia most countries refused to recognize the referendum and its results.
A change of power took place in Ukraine on Feb.22.
The Verkhovna Rada (parliament) ousted President Viktor Yanukovych from the power, changed the constitution and scheduled presidential elections for May 25. Yanukovych said that he was forced to leave Ukraine under the threat of violence, and he remains the legally elected head of state. A number of provinces in eastern and southern Ukraine, as well as the Crimea did not recognize the legitimacy of the Rada and decided on possibility of holding a referendum on the future fate of the regions.