PARIS (Reuters) -French police said on Thursday suspicions that a man had been walking around the northern city of Lille with a Kalashnikov assault rifle turned out to be a false alarm, and that instead it had been a seven-year-old boy playing with a toy weapon.

       Train traffic resumed after a police operation triggered by the initial reports momentarily paralysed the city center.

       (Reporting by Juliette Jabkhiro, Dominique Vidalon; Writing by Ingrid Melander; Editing by Richard Lough, William Maclean)