KARACHI: Pakistan Tehreek-e-Insaf (PTI) Karachi President Ali Zaidi on Saturday said that the PTI has submitted a request to Chief Secretary Sindh in writing over the release of probing reports in cases concerning Baldia Factory fire, notorious Lyari gang-war head Uzair Baloch and Nisar Morai’s involvement in murder of former Pakistan Steel Mills (PSM) chairperson Sajjad Hussain.