The Serbian Football Association is being investigated by Uefa after fans displayed an inappropriate banner during the European Championship match against England on Sunday.
The banner in question is said to have conveyed "a provocative message that is unsuitable for a sports event", according to Uefa.
The Kosovo Football Association is said to have filed a complaint with Uefa, related to Serbian flags, songs, and banners that conveyed "political, chauvinistic, and racist messages against Kosovo" during Sunday's match.
Uefa confirms that an investigation into what is described as "alleged discriminatory behaviour" by Serbian fans will be conducted.
Kosovo declared independence from Serbia in 2008, but Serbia has not recognised Kosovo as independent.
