A Serb nationalist newspaper has published a picture of a Bosnian Muslim soldier beheading a Serb prisoner.
A video of Muslims' killings showed last week shocked many Serbs
The image said to have been taken from a private video shot in the 1990s.
The international war crimes tribunal in The Hague has denied the paper's claims that the court refused to show the film because of its brutality.
The publication comes a week after Serbian TV broadcast a video of Serb paramilitaries executing Muslim prisoners in Srebrenica 10 years ago.
That video was screened at the international tribunal.
At least 12 of the Serb paramilitaries featured in it have since been arrested.
Correspondents say the footage shocked many Serbs who had previously denied that the massacre took place.
The Belgrade newspaper, Vecernje Novosti published a picture it claimed showed the beheading of Ensign Rade Rogic from Sanski Most.
The paper says its journalists were able to view private video footage of the 505th Buzim Brigade of the Bosnian government army showing heaps of mutilated bodies, torched villages and the killing of Ensign Rogic.
The paper said the tape was not fit for broadcasting.