Roskomnadzor — the country's Federal Service for Communications, Information Technology and Mass Media — went on to say that that authorities tried to contact Reddit multiple times, but did not receive any response.
The post was accompanied by a mock-up illustration of the Reddit's widely-recognized alien mascot on a "Wanted" poster.
Neither Reddit nor Roskomnadzor responded to requests for comment.
The news was originally broken by Meduza, a Lativa-based news organization run by a team of journalists who resigned from a popular Russian news site following controversy over independent content.
Meduza said the "offending content" was a Reddit page called "Minimal and Reliable Methods for Growing Psilocybe," a reference to magic mushrooms.
Concerns were reportedly raised by the Federal Drug Control Service, which could not be reached for comment.