Suspended Trinamool Congress MP Kunal Ghosh, an accused in Saradha chit fund scam, today threatened to go on a hunger strike if those involved in the scam were not arrested. Ghosh, while making his own submission before CBI judge Arvind Mishra, said he would go on indefinite hunger strike from Mahalaya day, which falls on October 12, and questioned why others involved in the scam were not arrested by the central agency.