As I predicted that Yug is Kavya's killer, the new promo proves that he really is the killer. I was really hoping that am wrongš. Although this idea is very lame (Ekta prolly ran outta ideas). Anyhow now am also thinking that since they showed Disha in tonight's episode ..just like Yug she came outta no where and she is not even needed anymore so maybe she is connected to this murder as well.
If you watch Kavya's death video when the fire broke Anjali was looking for Ved and Disha was the one who told Anjali that "mainnay toh ussay andar room main sulaaya tha" She is the one who put Ved inside the room and after she told her Anjali freaked out and Kavya went inside the room to get Ved and died while rescuing Ved. So it is highly possible that Disha is involved in this as well. As far as I assume she has no motive to kill Kavya either but Yug didn't really have any motive either but Ekta made him the killer I bet Disha has somethin to do with it as well. Anyone else agree with me?