Tombinski says publication of journalists' personal data is not in line with the Ukrainian personal data law / Photo from UNIAN

"I urge the Ukrainian authorities to help ensure that this content is no longer published," he said in a statement on Facebook on Wednesday evening.

"I have noted with the concern that some Ukrainian websites have published the personal data of journalists, who have received accreditation in the so-called "DNR" [or the Donetsk People's Republic, also known as DPR] and "LNR" [the Luhansk People's Republic, LPR]," he said.

He claims that the publication of the journalists' leaked personal data violates the best international practices relating to personal data protection, is "not in line with the Ukrainian law on the protection of personal data and puts journalists at risk."

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Read alsoOSCE: Journalists' personal data leak in Ukraine endangers their safetyAs UNIAN reported, Kyiv-based "Myrotvorets" website at psb4ukr.org posted personal information of reportedly more than 4,000 representatives of various Ukrainian and international media outlets, including CNN, Agence France-Presse, Reuters, the BBC, the New York Times, Vice News, and Al Jazeera, who were accredited by the so-called "DPR."