As part of an investigation carried out by the Istanbul Chief Public Prosecutor's Office, on 3 April police raided the homes of 18 people, including members of the Peoples' Democratic Party (HDP) Youth Assembly and journalist Sema Korkmaz, an employee of the Democratic Modernity magazine.

The detainees were taken to the Istanbul Security Directorate on Vatan Street. A confidentiality decision was brought to the investigation file, and it was learned that those detained were accused of "being a member of an illegal organization".

The detainees were asked questions about their attendance at the Kemal Korkut Football tournament and picnic organized by the HDP Youth Assembly, as well as about their participation in press statements and their posts on social media.