Serbian gangsters allegedly beat a traitorous associate to death with a hammer before cooking and eating his remains in Spain, police said.

Members of the Zemun Clan -- which was behind the assassination of Serbian prime minister Zoran Djindjic in 2003 -- dined on the remains of Milan Jurisic, 37, after he stole from the group, according to Sky News.

After Jurisic was beaten to death, his enemies flayed him with a sharp knife and put his flesh through a meat grinder in Madrid, the Daily Mail said.They threw his bones in the River Manzanares.

The grisly tale was retold to Croatian police by captured Zemun Clan member, Sretko Kalinic, nicknamed "The Butcher."

Spanish police found bones in the apartment where Jurisic was allegedly dismembered and in the river this week.

It's believed he was murdered in 2009 while on the run following his conviction in absentia for the hit on Djindjic.

Police suspect that Luka Bojovic was the ringleader of the cannibalistic murder. Bojovic was captured in Valencia last month -- he was a fugitive that was also convicted for killing the Serbian prime minister.

Documents found in Bojovic's apartment allegedly corroborated the account told by "The Butcher," Metro said.