Putin was cited as saying that the military operation in the area was now completed, and that the focus would switch to a political process that would eventually involve presidential and parliamentary elections.
Putin did not specify if he was referring to the whole of Syria, or just the areas around the Euphrates valley.
Russian President Vladimir Putin addresses workers of the GAZ factory in Nizhny Novgorod.
Russian President Vladimir Putin said a complete victory had been achieved over Islamic State on both banks of the Euphrates river in Syria, Russia's Interfax news agency reported on Wednesday.