The operation followed the killing of Ukrainian Col Ivan Voronych in broad daylight on Thursday, which sent a chill through Kyiv and marked the latest in an escalating battle between Ukraine’s and Russia’s vast and powerful state intelligence agencies.

Ukrainian Security Service says two Russian FSB agents suspected of killing Colonel Ivan Voronych on July 10 have been "neutralized" in Kyiv Oblast.

KYIV (Reuters) -President Volodymyr Zelenskiy met U.S. special envoy to Ukraine Keith Kellogg on Monday in the capital Kyiv, where they discussed boosting Ukraine's air defences and Kyiv buying weapons with European help.

President Volodymyr Zelensky met Monday with US special envoy Keith Kellogg in Kyiv and discussed air defence and sanctions on Russia during a "productive" conversation, the Ukrainian leader said.