Sources said that the police has contacted the tour guide who is currently in Nepal and he has denied any "involvement in the incident."
He is likely to return from Nepal tomorrow and has assured that he will join the probe, sources said.
The other accused will be identified once he joins the probe, the sources added.
One of the other accused, who was working at the hotel when the incident took place, is now working at some other hotel and police is making efforts to trace him.
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Police is mulling over the possibility of sending the hard disks and cameras to CFSL or FSL to try and retrieve the deleted footage that may give them clues, they added.
A police team is in touch with the US woman and is trying to convince her to come down to India and she has expressed willingness about joining the probe.
She has hired a law firm here and her lawyers are also in touch with police.