If it was HOS it wouldn’t surprise me. Even the HDZ government disapproved of their ‘tactics’ and the leadership in Zagreb had two famous HOS leaders, Ante Paradzik & Blaz Kraljevic assassinated but they called it “accidents.” The story goes at the behest of Slobo Milosevic, he made a deal with Tudjman to have HOS detachments forcefully disbanded and the HSP political party made illegal in Croatia, which is was in 1991-1992. The HOS didn’t mess around and they were feared even by Croats.