In a new development in the Bluestar controversy, a letter allegedly written by the then Prime Minister Indira Gandhi to Khalistani terrorist Bhindranwale a year before the 1984 operation has surfaced. The revelation of letter has only prompted an aggressive demand for complete revelation of what transpired during Operation Bluestar. While a cornered Congress party has ruled out probe, Delhi CM Arvind Kejriwal has joined the ongoing debate to declassify all documents related to Bluestar.