The TikTok account named "lumjanana009" published a video (15 seconds) yesterday (April 23) claiming that seven members of the Kosovo Police were injured in attacks by the Russian mercenary group "Wagner" in northern Mitrovica.
The aforementioned account, in this video material, in addition to an image showing several members of the Kosovo Police, has also placed the caption "7 POLICE IN MITROVIS ARE INJURED TODAY BY ATTACKS BY THE RUSSIAN WAGNER GROUP IN THE NORTH".
After fact-checking conducted by hibrid.info, it has been confirmed that the claim made by this TikTok account is false.
Hibrid.info, after research conducted through online search engines and social media, has not found any published reports regarding this event in any of the media outlets in Kosovo.
Link to the video material published on TikTok by the account "lumjanana009":
The video material published yesterday (April 23), as of the publication of this article, has managed to accumulate over 80 thousand views. (see photo below)

The aforementioned account apparently tried to link this false claim to the electoral process in the four northern municipalities of Kosovo, held yesterday (April 23). (see here)
Regarding the electoral process, the Kosovo Police announced in a statement that the elections held in the four northern municipalities, in terms of security, passed without any incidents. (see here Kosovo Police notification)
Analyze:
After verifying the facts, hibrid.info has confirmed that the TikTok account "lumjanana009" has published a video with the false claim that the Russian group "Wagner" has injured seven members of the Kosovo Police in north Mitrovica.
Based on its work methodology, hibrid.info assesses this claim as "Fake News".
Reasoning:
The "Fake News" rating is given to media reports that are entirely the product of a medium that itself contains factually incorrect claims or information.
Content that is considered fake news can be reliably determined to have been created and distributed with the intent to misinform the public, i.e., to present a claim that is completely false as fact.