I think of "censoring" as something that outside authorities do to others who want to discuss something or reveal some information. There is the concept of "self-censorship," not reporting something for fear of official retribution, but if I read that some information had been "censored," I would think that the media tried to report it but were prevented from doing so by government (or perhaps extra-governmental bodies like a terrorist organization). The government could do it through official channels that require newspaper copy to be submitted to a censor before publication and any broadcasts to be aired from tape that has been reviewed by government censors, or media could be censored officially or unofficially through confiscation of printed material, jamming of radio or TV broadcasts, etc.
But "obscured" is not right either. If the media in question knew something that they did not disseminate, they withheld (present tense: withhold; past participle: withhold, used in compound tenses such as "have withheld") news or information.