Western nations extend sanctions on Belarus, but diplomats are divided on their effectiveness.
Vladimir Putin and Alexander Lukashenko hold second day of talks in Sochi as US imposes sanctions over plane diversion.
Lukashenko hijacked a European civil aircraft because he thought he could get away with it. History shows he can.
Stoltenberg says Belarus to be punished over flight diversion as shock grows after activist stabbed self in Minsk court.