Russian President Vladimir Putin delivers a speech during his annual state of the nation address at the Kremlin in Moscow, Russia, December 1, 2016. REUTERS/Maxim Shemetov

MOSCOW (Reuters) - Russia is pressing ahead with construction of a road and rail bridge to Crimea and work is on schedule, President Vladimir Putin said on Thursday during his annual state of the nation address in the Kremlin.

Russia annexed Crimea from Ukraine in 2014.