Police say a 17-year-old has turned himself in following an attack in Dresden on Matthias Ecke, a German member of the European Parliament.
The teen reported to the Dresden-Süd police station early Sunday morning and told officers he had assaulted the politician from the Social Democratic Party, the State Criminal Police Office (LKA) says.
The investigation is ongoing and police are working to corroborate the teen's statements, a LKA spokeswoman says.
Ecke was brutally beaten by a gang of four assailants on Friday evening while hanging campaign posters in the eastern German city. He was hospitalized and required surgery.
Witnesses described the assailants as dressed in dark clothing and said they seemed to be part of the far-right extremist scene.
The three other suspects are still unknown, police say.