Busti, on 25 January 2006 the Argentine national government announced it would take the issue to the International Court of Justice in The Hague, accusing Uruguay of violating the bilateral Treaty of Uruguay River dealing with the conservation of the Uruguay River; Uruguay's chancellor Gargano called this "a grave step" which bypassed and ignored the institutions of the Mercosur, and said Uruguay would protest the lack of action of the Argentine government with regards to the roadblocks at the Controversy Resolution Tribunal of Asunción. On 30 January the High Level Technical Group (Grupo Técnico de Alto Nivel, GTAN), a joint Argentine-Uruguayan commission for the study of the impact of the paper factories, ended deliberations with the two countries issuing separate statements. The Argentine Foreign Ministry accused the Uruguayan members of GTAN of withholding information, which the Uruguayan officials denied. The GTAN had met 180 days before, as mandated by the Uruguay River Statute. The government of Entre Ríos, in the meantime, distributed 100,000 pamphlets about the paper factories and their alleged impact among those attending the Cosquín music festival in Córdoba, which ended on 29 January. February 2006 On 6 February 2006 Uruguayan President Tabaré Vázquez acknowledged that he had spoken on the phone to Argentine President Néstor Kirchner the previous week, in order to look for a solution of the conflict. Regardless, he also announced that in any event the construction of the mills would not be halted by the Uruguayan government. On 3 February 2006 members of the Gualeguaychú Environmental Assembly had started a long-term blockade of Route 136, leading to the Libertador General San Martín Bridge and to Fray Bentos. Several votes were taken on the issue, in every case resolving to maintain the blockade. At the beginning of the blockade, Jorge Eduardo Lozano, designated bishop of Gualeguaychú, stated that he supported the protesters because theirs was "a just cause", though he also spoke of the need to look for "reasonable alternatives". The archbishop of Montevideo, Nicolás Cotugno, offered to mediate. In the meantime, the citizens of Gualeguaychú, after an assembly, rejected the mediation of Nobel Peace Prize-winner Adolfo Pérez Esquivel; he had asked them to end the blockades while talks were conducted. On 12 February about 400 people, gathered by the Colón Environmental Assembly, went in nearly 100 vehicles from Colón (100 km north of Gualeguaychú) to the international General Artigas Bridge, demonstrating there and creating