The Deputy Speaker of the House of Representatives, Emeka  Ihedioha, Governor of  of Kaduna State,  Ramalan Yero, and the Acting Governor of Taraba State,  Garba Umar, were among dignitaries in the premises of the Peoples Democratic Party (PDP) Secretariat when a policeman on duty surreptitiously released a canister of tear-gas on a crowded corridor on the first floor of the building.
Source: http://www.ereporter.com.ng/index.php/political-news/item/1141-ihedioha-governors-others-tear-gassed-at-pdp-secretariat