The lawsuit was instituted for discrimination based on gender and family status.
Bulgaria's Grand Mufti's Office called on the police on Friday to investigate an attack on its office in the capital, Sofia, as a "hate crime".
The windows of the building in central Sofia were smashed with stones by an unknown person on Thursday, three days after swastikas and other hate symbols were scratched onto a mosque in the central town of Karlovo on July 2.
The central Bosnian town of Zenica in May hosted several young people from several towns in Bosnia with one aim - to paint over offensive, hateful graffiti.
Nationalist and political slurs and threats against ethnic groups are now transformed into a colourful mural, under a team led by Faruk Celikovic, a young street artist.