The diplomat noted that in late February 2014, he had been reporting almost daily to the acting president, prime minister, and foreign minister.
Former Ukrainian Ambassador to Russia, now Ukraine's Permanent Representative to the United Nations Volodymyr Yelchenko is testifying in Kyiv's Obolonsky district court as a witness in the Yanukovych's treason case.
The questioning began at about 11:30 Kyiv time, an UNIAN correspondent reports.
Yelchenko noted that at the end of February 2014, he had been reporting almost daily to the acting president, prime minister and foreign minister.
"As Ukraine's ambassador to Russia, I proceeded from doing everything possible to return our bilateral relations to normal, despite those tragic events," the diplomat said.
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Yelchenko served as the Ambassador of Ukraine to the Russian Federation from July 2010 to December 2015.