Media blackout
Media blackout is the censorship of news related to a certain topic, particularly in mass media, for any reason. A media blackout may be voluntary, or may in some countries be enforced by the government or state. The latter case is controversial in peacetime, as some regard it as a human rights violation and repression of free speech. Press blackout is a similar phrase, but refers specifically to printed media. Media blackouts are used, in particular, in times of declared war, to keep useful intelligence from the enemy.