ASTANA, July 4 (Reuters) - Russian President Vladimir Putin said on Thursday that he had seen fragments of the debate between Joe Biden and Donald Trump but that he had enough of his own work to attend to, and added that the United States remained a great power.

Asked about Trump's suggestion that the war in Ukraine could be ended swiftly, Putin said that Russia took him seriously. (Writing by Guy Faulconbridge; Editing by Mark Trevelyan)