On 24 May the Twelve proposed reinforcing the National Guard patrols round the Convention. On 26 May, after a week of silence, Robespierre delivered one of the most decisive speeches of his career. He openly called at the Jacobin Club "to place themselves in insurrection against corrupt deputies". Isnard declared that the Convention would not be influenced by any violence and that Paris had to respect the representatives from elsewhere in France. The Convention decided Robespierre would not be heard and Isnard hindered him to speak. The atmosphere became extremely agitated; some deputies were willing to kill if Isnard dared to declare civil war. On 28 May the Commune accepted the creation of a sans-culottes army to protect the revolution and enforce revolutionary laws. Robespierre called for an armed insurrection against the majority of the Convention. On 29 May, the delegates representing 33 of the Paris sections formed an insurrectionary committee. On 30 May several new members were added to the Committee of Public Safety: Saint-Just, Couthon and Hérault-Seychelles. Early in the morning of Friday 31 May the city gates were closed and the tocsin in the Notre-Dame was rung. Hanriot ordered to fire a canon on the Pont-Neuf as a sign of alarm. Vergniaud suggested to arrest Hanriot. Robespierre attacked Vergniaud and accused the Girondins of royalism. He urged the arrest of the Girondins, who had supported the installation of the Commission of Twelve. Around ten in the morning 12,000 armed citizens appeared to protect the Convention against the arrest of Girondin deputies. On Saturday afternoon 40,000 men surrounded the Convention to force their arrest. The attack on the representatives was led by Marat. He called for the arrest of nine members of the Commission of Twelve and repeated his call for the expulsion of 22 Girondins, who in January had voted against the execution of the King and since then paralyzing the Convention. The accused Girondins believed they were protected by the law, but the people on the galleries called for their arrest. Some deputies were willing to step down, others refused. The commune declaring itself duped demanded and prepared a "Supplement" to the revolution. The next day Hanriot was ordered to march his National Guard from the town hall to the National Palace. In the early evening on 2 June, a large force of armed citizens, eighty or hundred thousand were estimated, surrounded the Convention with artillery. "The armed force", Hanriot said, "will retire only when the Convention has delivered to the people the deputies denounced by the Commune."