Russia is advancing around Kostyantynivka and in the Sumy region with small, fast-moving units as both sides try a new tactic of using motorcycles and civilian cars to quickly cross open terrain.

Russian forces have launched a large-scale drone assault across Ukraine, where officials said three people were killed and 64 others wounded.

As the G7 group of large democratic nations with big economies meets Sunday in Alberta, Canada they have a broad agenda in the midst of global economic and military turmoil.

Trump administration in talks with Capitol Hill to amend the Graham-Blumenthal legislation imposing sweeping sanctions on Russia, including 500% tariffs on countries doing business with Moscow.

Mykhailo Drapatyi, a 42-year-old general who took command as Ukraine pushed for military reform, said he replaced half of the leaders under him.

A peace deal is in the "best interest" of Ukraine, Russia and the U.S, Defense Secretary Pete Hegseth said on Tuesday.

Russian drone strikes and bombs killed at least three people in the northeastern Ukrainian city of Kharkiv overnight, regional officials there said.

Serbia's populist President Aleksandar Vucic travelled to the Ukrainian city of Odesa for a regional summit on Wednesday, the first time the Moscow-friendly leader has visited the country during his 12 years in power.