The party said in a statement it hoped the perpetrators would be appropriately punished as such incidents were unacceptable.
Croatia must guarantee security and protection to all of its citizens, regardless of nationality, race, faith, gender, political views, social status and other differences, for which the HSLS strives and will continue to do, the statement said.
The incident occurred in the early morning hours of Tuesday as four Serb returnees' houses were stoned and a fire was set in one yard. The firefighters and the police intervened swiftly and four perpetrators were arrested.