Jets and air defense systems were involved in the response, Warsaw said.

In the updated US peace plan submitted by Ukraine to Washington, Kyiv rejected the demand to cede the Donbas to the Russian regime and refused to give up its bid for NATO membership, reports The New York Times.

Under the latest US proposal, if a future Russian government decides to claim more Ukrainian territory, it would risk direct US and NATO military involvement.

Ukraine's Zelensky said he cannot cede land to Russia as he has no legal or moral right to do so. Follow Newsweek's live coverage.

Almost all of NATO's foreign ministers gathered in Brussels Wednesday, a day after inconclusive Ukraine peace talks between the U.S. and President Vladimir Putin, and as European officials struggled f