Of the 1,004 verified cases against civilians and prisoners of war, 89% were attributed to the Russian side, the report said.

In May, Russia's state-controlled polling agency VTsIOM (Russian Public Opinion Research Center) changed its methodology after Putin’s approval rating dropped to 65.5 percent, a slump of 12.2 percentage points since December and the lowest level since the start of the war.

The former UK PM said: "I don't know what warped logic drove Putin to blow up a stationary Ukrainian locomotive on the Polish border this morning".

The bill was championed by GOP Sen. Lindsey Graham, who died suddenly just one day after announcing a deal had been reached with the White House to move forward.

European countries are growing concerned that Russia may decide to strike beyond the borders of Ukraine, leading governments across the continent to warn that any attempt by Moscow to destabilize the region will backfire.

Russia also placed the local businesses of French retailers Auchan and Leroy Merlin under temporary external administration, according to a presidential decree.

The Kremlin is once again seeking to undermine confidence in American democracy with online influence campaigns, U.S. officials said.

Increasingly frequent and ferocious attacks on the Ukrainian capital have left many on edge.