"I don't know what to say and why these things happen. It's sick and pathetic... Hope the government will take strong action against it," Ganguly told a Bengali news channel.
The retired cricketer, who is being wooed by several political parties of late, demanded justice for the gangrape victim who had been brutalised twice.
The 16-year-old died at a government-run city hospital on Tuesday from burns she suffered after she allegedly tried to set herself on fire on December 23.
However, the police said the girl in a dying statement had accused the two rapists of setting her on fire.