The United States and European Union on Wednesday promised a fresh wave of sanctions against Russia for its relentless invasion of Ukraine, with Washington accusing Russian leader Vladimir Putin of not being "honest" in responding to its peace efforts.

MOSCOW (Reuters) -Russia's lower house of parliament on Wednesday approved a move to withdraw from a landmark agreement with the United States aimed at reducing vast stockpiles of weapons-grade plutonium left over from thousands of Cold War nuclear warheads.

The European Union on Thursday formally adopted sweeping sanctions targeting Russia's energy sector, a day after the United States announced punitive measures against the Kremlin's oil industry.

For the first time in his second term, President Trump is imposing new sanctions, but they may not shift the course of Russia’s war in Ukraine.

LONDON (AP) — Ukrainian President Volodymyr Zelenskyy was in London on Friday for talks with two dozen European leaders who have pledged military help to shield his country from future Russian aggression if a ceasefire stops the more than three-year war.

The Russian foreign ministry accused U.S. Senators of undermining the work of Moscow and Washington on the reunification of Ukrainian children with their families, an effort spearheaded by First Lady Melania Trump.

By Dmitry Antonov, Pavel Polityuk and Simon Johnson MOSCOW/KYIV/LINKOPING, Sweden (Reuters) -Russia said on Wednesday it had carried out a major training exercise involving nuclear weapons, a day after the United States announced a delay in plans for a second summit between presidents Vladimir Putin and Donald Trump on the war in Ukraine.

The European Union has heaped more economic sanctions on Russia, adding to U.S. President Donald Trump’s new punitive measures the previous day against the Russian oil industry