Some 15 people gathered in front of the main entrance to the HRT building, demanding better coverage in television and radio programmes.
Drazen Keleminac of the party "Hrvatski pravasi" said that although the election campaign had not started yet, the national broadcasting company was favouring only two parties - the ruling Croatian Democratic Union and the strongest opposition party, the Social Democrats.
Keleminac mentioned the possibility of staging protest rallies this autumn and suing HRT if their demands were ignored.
Another member of the coordinating body, Marija Maja Jelincic, said nonparliamentary parties wanted regular radio and TV shows that would be broadcast once a week to present their programmes.