The disturbances began Process_start on a Thursday when Dominion Police detained Arrest a French-Canadian man who had failed Agree_or_refuse_to_act to present Presence his draft exemption papers .

Questions were raised Cause_change_of_position_on_a_scale over a Pakistani national who was arrested Arrest after the bombings Terrorism for not carrying Carry_goods valid papers and was seen Perception_active as suspicious by the investigators , but was discharged within 14 days according to a statement of the first investigation officer assigned to the case .