Putin says Russian air strikes to last until plane bombers are punished

Russian President Vladimir Putin attends a video conference with Russia's personnel engaged in Syria military operation, at the Novo-Ogaryovo state residence outside Moscow, Russia November 20, 2015. REUTERS/Mikhail Klimentyev/Sputnik/Kremlin

TEHRAN (Reuters) - President Vladimir Putin said on Monday Russian air strikes in Syria would last as long as was necessary to punish those guilty of blowing up a Russian airliner over Egypt last month, an incident in which 224 people were killed. (Reporting by Denis Pinchuk; Editing by Andrew Osborn)