Real Sociedad v Zenit: The club has been fined 30,000 euros

Today UEFA announced their review of the final matches of the group stage of the UEFA Europa League.
«Реал Сосьедад» — «Зенит»: клуб оштрафован на 30 тысяч евро
Zenit were fined 30,000 euros for damage caused by fans to the home side's stadium, the use of pyrotechnics, throwing foreign objects and the general disorder inside the stadium. 

UEFA also stated that Zenit must contact Real Sociedad to resolve the issue of the damage caused by the fans.