The TikTok account named "sherbimisekret1945" published a video on December 23rd, with the caption claiming that according to the Kosovo Police, three police officers were killed in the north of the country.
Hibrid.info has verified the claim and has not found it confirmed in official sources.
Link to the video material published on TikTok by the account "sherbimisekret1945":
https://www.tiktok.com/@sherbimisekret1945/video/7315504721739975968

Hibrid.info has secured the 24-hour report from the Kosovo Police, for the date on which the alleged video material in question was published.
This report, which includes information about the Kosovo Police regional directorates for South and North Mitrovica, does not confirm the claim of the account in question. (see photo below)

Meanwhile, even through research on the "Google" search engine, hibrid.info has not found confirmation of the claim made by the "sherbimisekret1945" account (see here).
The last time a case of killing of police officers occurred in the Mitrovica region was on September 24, when Kosovo Police Sergeant Afrim Bunjaku was killed (see here and here).
Analyze
A TikTok account has published a video claiming that three police officers were killed in Mitrovica, according to the Kosovo Police.
Hibrid.info has researched and based on the 24-hour Police report, has not found the claim confirmed.
Therefore, based on its work methodology, hibrid.info evaluates this video material as "Fake News".
rationale
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.