Russian military personnel surround a Ukrainian military base on March 19, 2014 in Perevalnoe, Ukraine. (Dan Kitwood/Getty Images)

After reports that Russian tanks and troops have rolled into eastern Ukraine again, the U.S. Ambassador to the U.N., Samantha Power, said Russia is pursuing war while talking peace.

More than 4,000 people have died since the fight between pro-Russian separatists and Ukrainian forces started in April, and more than a million people have been displaced.

NATO’s top commander says Russia’s strategy may be to reinforce “pockets” where the separatists have control.

David Stern, the BBC’s correspondent in Kiev, spoke to Here & Now‘s Robin Young about the accusations.

Note: This BBC interview can be heard in the Here & Now podcast or with the WBUR app.

Guest

• David Stern, BBC correspondent in Kiev. He tweets @loydstern.