BRS leader Kavitha's judicial judicial custody was extended till April 23 by a Delhi court on April 15.
The daughter of former Telangana chief minister K Chandrasekhar Rao was earlier arrested by CBI on April 11 in Tihar jail in the Delhi liquor case.
She had been lodged in the jail after her arrest by the ED in a money laundering case linked to the alleged scam.
It is alleged that Kavitha is a key member of the 'South Group', which has been accused of paying Delhi's ruling AAP kickbacks of Rs 100 crore in return for a big share of liquor licences in the national capital.