Khan has been arrested by the Waliv Police on charges of abetment to suicide.
The TV actor allegedly died by suicide on Saturday during a shoot at Vasai near Mumbai.
According to the information revealed so far, no angle of blackmailing Tunisha has come to the fore.
After the tea break during the shooting, 20-year-old Tunisha's body was found hanging in the washroom.
Apart from daily soaps, Tunisha appeared in several films such as Fitoor, Baar Baar Dekho, Kahaani 2: Durga Rani Singh and Dabangg 3.