In August, Colonel Dragutin Dimitrijević "Apis", the head of the Serbian Black Hand organisation, sent a letter requesting Boletini and his men to assist the Serbs in fighting the Ottomans. The Black Hand stimulated and encouraged the Kosovo Albanians in their revolt, promising them help; Colonel Apis visited northern Albania several times in order to get in touch with the leaders of the Albanian uprising, especially Isa Boletini. Apis declared that the Serbs only wanted to liberate the Albanians from Ottoman subjection, and that the Serbs and Albanians both would benefit from liberating the country. Succeeding in persuading the Kosovo Albanians to fight against the Ottomans, however, Apis and his men committed political murders disguised as Albanians, and eventually the Montenegrin and Serbian armies massacred Albanians, and stopped the inflow of arms to the Albanians, in early September 1912.