Amid the deadlock on the front lines, Ukraine's elite soldiers are finding other ways to cause problems for Russia.

Authorities say a Russian missile hit a Ukrainian army training ground in an attack that killed three soldiers and wounded 18 others

Ukraine's armed forces have confirmed a Russian missile strike hit a military training unit, causing a number of casualties. Ukrainian ground forces said late on Tuesday that three service personnel were known to have been killed and 18 had been wounded.

Oil prices continued to climb in early Wednesday trading, extending gains from the previous session as supply fears intensified following U.S. President Donald Trumps warning to Russia over the Ukraine war.