From A Local Ukrainian Publication:
The police said that the persons of the event were identified. Open criminal proceedings with the preliminary qualification "Hooliganism". An investigation is underway. Together with the prosecutor's office, the police will make a procedural decision with a possible re-qualification.
According to local journalists, the striker with a knife is Vitaliy Vorobyov, a 39-year-old Poltava citizen, and Viktor Bezruchko, a 34-year-old, is his companion.
Vitaly Vorobyov, aka Vorobey, was once a member of the criminal group - the Bassistoy brigade. He is also a good friend of the people's deputy Ilya Kiva.