KYIV (Reuters) - A Ukrainian judge rejected a prosecutor's request to arrest ex-president Petro Poroshenko in a treason case, in a televised hearing on Wednesday.

       Judge Oleksiy Sokolov said Poroshenko should instead appear before prosecutors and investigators when requested to do so.

       Poroshenko is being investigated for treason in a case that he says was cooked up by allies of his successor, President Volodymyr Zelenskiy.

       (Reporting by Natalia Zinets; writing by Matthias Williams; Editing by Jon Boyle)