This changed in May 1903, when Serbian military officers led by Dragutin Dimitrijević stormed the Serbian Royal Palace. After a fierce battle in the dark, the attackers captured General Laza Petrović, head of the Palace Guard, and forced him to reveal the hiding place of King Alexander I Obrenović and his wife Queen Draga. The King was subsequently shot thirty times and the Queen eighteen. MacKenzie writes that "the royal corpses were then stripped and brutally sabred." The attackers threw the corpses of King Alexander and Queen Draga out of a palace window, ending any threat that loyalists would mount a counterattack." General Petrović was then killed when Vojislav Tankosić organized the murders of Queen Draga's brothers. The conspirators installed Peter I of the House of Karađorđević as the new king.