Sebi-Sahara case: How it all began
Jail officials said Wednesday the three were heard talking till late in the night on the legal battle that lies ahead of them.
Roy reached the jail around 8 pm Tuesday and was sent for medical examination as part of a normal procedure.
Read: Hard times for Subrata Roy in Tihar after 'picnic'
The Supreme Court sent Roy and two others to judicial custody till they present a concrete proposal to return the balance of Rs.19,000 crore they collected from investors through optionally fully convertible debentures.
Read: Sahara boss gets ink on his face, assailant calls him thief
Watch video: Subrata Roy gets ink thrown at him