SHAFAQNA – The Grand Ayatollah Makarem Shirazi answered questions about censorship.
Question: Is censorship of news and evens allowed in Islam? If it is allowed, what is its level?
The Grand Ayatollah Makarem: Broadcasting any news which is harmful to society, or causes awakening of the enemy or they misuse it, or causes disunity of Muslims, or causes hopelessness or fear, or similar consequences; such news must not be broadcasted. For this reason at the time of war many news are not broadcasted until the removal of danger; similar to this meaning, in other cases this is completely possible.
Source: PERSIAN SHAFAQNA