Who did Polish authorities arrest over the alleged plot against Tusk?

Polish authorities arrested a man suspected of planning an assassination attempt against Prime Minister Donald Tusk and Defence Minister Władysław Kosiniak-Kamysz [1, 2]. The threat was reported to police through the State Protection Service and officials said they are treating it as potentially actionable [1]. However, the stories provided don't identify the suspect by name, only referring to him as "a man" [1, 2, 3].