DEVELOPING A Frenchman was arrested Thursday in the “advanced stages” of a plot to attack the country, Interior Minister Bernard Cazeneuve said. However, Cazeneuve said the man arrested in Argenteuil, on the northern outskirts of Paris, was not linked “at this stage” to recent attacks in Paris and Brussels. He said the person was implicated at a “high level” in the alleged plot but provided no details. At the same time, Sky News quoted Cazeneuve as saying five suspects had been arrested during anti-terror operations in the Brussels neighborhood of Schaerbeek.