Ukraine crisis: Russia’s referendum on Crimea secession illegal, Germany says

Germany’s Angela Merkel delivered a rebuke to Russian President Vladimir Putin on Sunday, telling him that a planned Moscow-backed referendum on whether Crimea should join Russia was illegal and violated Ukraine’s constitution.

Putin defended breakaway moves by pro-Russian leaders in Crimea, where Russian forces tightened their grip on the Ukrainian Black Sea peninsula by seizing another border post and a military airfield.