▁quick ▁to ▁bl ame ▁Aleks and rov ' s ▁murder ▁on ▁the ▁commun ists , ▁while ▁they ▁claimed ▁that ▁Mih ail ov ▁may ▁have ▁actually ▁been ▁responsible ▁for ▁the ▁murder . ▁These ▁events ▁created ▁fr iction ▁between ▁fa ctions ▁within ▁the ▁organization ▁and ▁led ▁to ▁several ▁high - profile ▁mur ders , ▁including ▁that ▁of ▁Pet ar ▁Ch au lev ▁( who ▁led ▁the ▁O hr id ▁u pr ising ▁in ▁ 1 9 1 3 ) ▁in ▁Milan . ▁During ▁the ▁inter war ▁period ▁IM RO , ▁took ▁action ▁against ▁several ▁former ▁members ▁of ▁IM RO ' s ▁Sand an ist ▁( left - wing ) ▁fa ction . ▁G jor che ▁Pet rov ▁was ▁killed ▁in ▁Sof ia ▁in ▁ 1 9 2 2 , ▁Tod or ▁Pan its a ▁( who ▁had ▁previously ▁killed ▁the ▁right - wing ▁Bor is ▁Sar af ov ▁and ▁Ivan ▁Gar van ov ) ▁was ▁assass in ated ▁in ▁Vienna ▁in ▁ 1 9 2 4 ▁by ▁Mih ail ov ' s ▁future ▁wife ▁Men cha ▁K arn ich iu . ▁D imo ▁Had j id im ov , ▁Georg i ▁Sk riz hov ski , ▁Aleks and ar ▁Bu j nov , ▁Ch ud om ir ▁Kant ard j iev ▁and ▁many ▁others ▁were ▁killed ▁in ▁a ▁series ▁of ▁consecutive ▁mur ders ▁all ▁taking ▁place ▁in ▁ 1 9 2 5 . ▁Mih ail ov ' s ▁group ▁of ▁young ▁IM RO ▁cad res ▁soon ▁fell ▁into ▁conflict ▁with ▁the ▁older ▁group ▁of ▁the