Civilians escape Sumy and Irpin after Russia declares another ceasefire, but attacks reported in Mariupol.

• Ukrainian officials say civilians are being evacuated from the besieged areas of Irpin, near the capital, Kyiv, and northeastern Sumy.
  Russia has declared another ceasefire and says a string of humanitarian corridors have been opened.
  Moscow says evacuees will be allowed to travel to safer places in Ukraine after Kyiv rejected an earlier plan to funnel civilians to Russia and Belarus.
  UN refugee chief says the number of people fleeing Russia’s offensive has reached two million.
  Moscow threatens to close a major gas pipeline to Germany as Western powers weigh a ban on Russian oil.
  British oil giant Shell to stop buying Russian crude and withdraw from involvement in the country’s hydrocarbons.