Ukraine war latest: At least 32 Ukrainian POWs executed in Russian captivity during winter, UN says

Key developments on March 26: * UN: At least 32 Ukrainian POWs executed in Russian captivity during winter * Russian landing ship Konstantin Olshansky hit with Neptune missile, says Ukraine * Ukraine dismisses Security Council secretary Danilov * Polish official says NATO considering shooting down Russian missiles that approach its borders * SBU says it