Polish authorities have arrested the former lawyer of late Russian oligarch Boris Berezovsky in an investigation related to attacks on Russian opposition figures, Polish radio reported on September 20. The arrest of the lawyer, identified by prosecutors only as Anatoly B, had earlier been reported by independent Russian media, Polish private radio channel RMF FM said. A spokesperson for the National Prosecutors' Office confirmed the arrest but declined to give a reason. NATO member Poland has arrested several people in recent months in connection with acts of sabotage on its territory that it says were committed on Russian orders.