A Congress - Khilafat procession took place at Chauri Chaura in U.P. district of Gorakhpur on February 5, 1922. Irritated by some policemen's behavior, they were attacked by a crowd section. The police opened fire on the unarmed procession in retaliation. Instigated by this, the whole procession attacked the police and the mob set fire to the building when the police hid inside the police station. The cops who were trying to escape were hacked into pieces and thrown into the fire. In the Chauri Chaura incident, 22 police officers were killed. Gandhi was profoundly disturbed by the Chauri Chaura incident news. Gandhi decided to withdraw the movement because it violated the strict condition of non - violence that he had set for the launch of the civil disobedience phase and the continuation of the non - cooperation movement. Thus, the Non - Cooperation Movement came to an end on February 12, 1922.