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

"We discussed the path to peace and what we can practically do together to bring it closer. This includes strengthening Ukraine's air defense, joint production, and procurement of defence weapons in collaboration with Europe," Zelensky wrote on social media.