(CNSNews.com) – Deputy Attorney General Rod Rosenstein says Americans should “exercise caution” when reading news reports based on anonymous sources.

In a statement issued Thursday night, Rosenstein said:

Americans should exercise caution before accepting as true any stories attributed to anonymous ‘officials,’ particularly when they do not identify the country – let alone the branch or agency of government – with which the alleged sources supposedly are affiliated. Americans should be skeptical about anonymous allegations. The Department of Justice has a long-established policy to neither confirm nor deny such allegations.

Rosenstein’s statement was issued around two hours after The Washington Post published a story in Friday’s edition saying that Special Counsel Robert Mueller is investigating Jared Kushner’s business dealings as part of the wider Russia probe.

“FBI agents and federal prosecutors have also been examining the finances of other Trump associates, said U.S. officials familiar with the matter,” the Post reported.

The report said “officials who described the financial focus of the investigation spoke on the condition of anonymity because they were not authorized to speak publicly.”

In Thursday’s edition, The Washington Post reported that Special Counsel Robert Mueller is investigating President Trump “for possible obstruction of justice.”

The report, based on five anonymous sources, described the latest (alleged) development in the investigation as a “major turning point.”