Indrani Mukherjea, wife of media baron Peter Mukherjea and former CEO of INX Media, has been arrested on charges of killing her sister, police sources said on Tuesday.
A top police official, while confirming the arrest, declined to be identified or provide details of the case.
Indrani has been charged with murdering her sister Sheena in 2012 and disposing of her body in Raigad, adjacent to Mumbai.
She allegedly plotted the conspiracy but the exact motive is not yet clear.
She was produced before a court which sent her to police custody till August 31.
Police claim to have recovered evidence from the spot where the victim's body was buried in Raigad.
