The Delhi Police used tear gas, water canon and lathi-charged Arvind Kejriwal and his supporters as the anti-graft activists attempted to 'gherao' the residences of Prime Minister Manmohan Singh, Congress President Sonia Gandhi and BJP President Nitin Gadkari. Despite being denied permission by the Delhi Police, a defiant Mr Kejriwal continued with his protest plans. He alleges that the Congress and the BJP have collaborated to ensure Parliament does not function. Video courtesy: NDTV