The Kurdistan Workers’ Party (PKK) was blamed and still to this day some Turkish officials and pro-Turkey media outlets accuse them.
[1][2] In 2015, former Interior Minister İdris Naim Şahin later stated “I have unfortunately learned that the people who sabotaged the bus, throwing Molotov cocktails, were members of MİT”.
[4] The Main opposition Republican People’s Party (CHP) also raised questions about the incident in 2015 at the Turkish parliament.
[5][6][7][8] In the same year members of the CHP Youth Organization marched in front of the Galatasaray High School, chanting slogans and showing signs reading "The murderer state will be accountable", "The Molotov MIT Official Who Killed Serap Eser 241 Children were Murdered under AKP rule.
After Interior Minister İdris Naim Şahin statements, four of who were accused of carrying out the attack, filed a complaint to the Bakırköy Public Prosecutor’s Office on 23 January 2015.