Complete Ukraine coverage: Nighttime shelling increases, oil prices jump again, and more

Here’s the latest on Russia’s war on Ukraine:

  • The head of the U.N. refugee agency says more than 1.5 million refugees have left Ukraine for neighboring countries.
  • A Ukrainian official says a second attempt to evacuate civilians from a besieged city has failed due to Russian shelling.
  • Ukraine official: Russian forces step up nighttime shelling of cities in the center, north and south of the country.
  • Oil prices jump more than $10 a barrel, shares sink as US mulls calling for ban on imports of crude from Russia.