athens greek police find bomb-making equipment detonators raid athens tuesday question nine people suspect link ban militant group turkey ahead expect visit turkish president tayyip erdogan next week eight men woman think hold turkish citizenship detain morning raid three different address central athens expect appear investigate magistrate wednesday early police officials tell reuters individuals quiz allege link leftist militant dhkp/c outlaw group blame string attack suicide bomb turkey since 1990. three home police find materials available commercially could potentially use make explosives say statement also retrieve digital material travel document pistol one detainees want greek police connection arm explosives haul greek island chios close turkish coast 2013. witness saw police experts hazmat suit hold suitcases enter one address athens test unknown substance find jar expect conclude within day turkey erdogan widely expect visit greece december although visit officially announce would first visit turkish president 50 years another official tell semi-official athens news agency case unconnected domestic terror group militant islamists describe question turkish origin dhkp/c know also revolutionary people liberation party/front consider terrorist group european union turkey unite state greek police raid find explosives nine hold link ban turkish group