Welfare. From there, he opposed himself to Esteban Righi and others representatives of the Peronist left-wing. Perón returned to Argentina on 20 June 1973, acclaimed by the masses. The Ezeiza massacre, organized by López Rega on the day of Perón's return from an 18-year exile, led to a definitive split between left and right-wing Peronism, with Cámpora as representative of the left-wing and López Rega as representative of the right-wing. López Rega had positioned snipers under Perón's stage, who opened up fire upon the masses and the left-wing Peronist organizations, such as the Montoneros, etc. On the following days, Mario Roberto Santucho, leader of the Guevarist Ejército Revolucionario del Pueblo (ERP), held a press conference during which he accused López Rega and Colonel José Manuel Osinde of the massacre. Perón and López Rega, who, while in Spain, had supported left-wing Peronists, strongly criticized them this time around. López Rega openly criticized president Cámpora's position during the cabinet's meeting. After finding out about Perón's meeting with José Ignacio Rucci and other right-wing CGT leaders and also with the Army, Cámpora and his vice-president Vicente Solano Lima resigned. All of Cámpora's followers were sacked from all government positions, and López Rega's son-in-law, Raúl Alberto Lastiri, also a member of P2, became interim president and organized the elections. On 23 September 1973, Perón won them with almost 62% of the votes, naming his third wife Isabel Perón as vice-president. Beside Raúl Lastiri's interim presidency, López Rega's success in the expulsion of the left-wing Peronists from power was confirmed on 4 August 1973, during the National Congress of Perón's Justicialist Party, with the nomination of his protector Isabel as candidate for vice-presidency. On 23 September, the Perón-Perón ticket won comfortably, with 61.85% of the votes. Troubled by the right-wing shift of Peronism and of the government, the Montoneros, a left-wing Peronist group, assassinated CGT's leader José Ignacio Rucci on 25 September 1973. The latter had also been involved in the creation of the Triple A (Alianza Argentina Anticomunista — Argentine Anticommunist Alliance). This assassination gave a pretext to López Rega to decree the prohibition of all armed groups and the closure of El Mundo, a left-wing newspaper. On 21 November 1973, radical senator Hipólito Solari Yrigoyen was seriously injured in the first terrorist attack claimed by the Triple A. Federal Police Chief Rodolfo Almirón had been suspected of organizing this attack. Role in the