Serbia's Ministry of Culture and Information said on Friday that the incident with leaflets thrown into the N1 yard undoubtedly endangered the safety of journalists working there, the FoNet news agency reported.
Serbia must not become a country in which political views and convictions are expressed in a way contrary to the law, public order and general interest, the Ministry says in a statement.
It adds that the pressures on journalists are inappropriate and for condemnation in every democratic society.
The Ministry says it "rightfully expects the police and prosecution, which it trusts, to do everything to bring to justice and appropriately punish the perpetrators and the masterminds."
It also said it was inadmissible that the "1 in 5 million" protesters gathered outside the state RTS TV every Saturday, painting its doors, glueing posters and messages, and alike, thus putting pressure on the public broadcaster's employees.
The statement added that the whole society had to take the attacks and pressures on media people more seriously.
"The Ministry advocates a free flow of information, freedom of opinion and speech as long as it doesn't endanger any Serbia's citizen," the statement said.