The AICC also questioned BJP and Prime Minister Narendra Modi as to why they have been silent on the issue when the leader of their key ally at the Centre and Andhra Pradesh is involved.
Congress spokesperson Shobha Oza used the occasion to also target Telangana's ruling TRS. She told reporters that a probe is needed in the wake of a host of allegations against the TRG government including that of snooping and tapping of telephones.
Besides, she wanted the Andhra Assembly Speaker to go into the charges against a TDP leader.
"When a scam of such magnitude has come to the fore, why is the BJP and the Prime Minister keeping mum?" she asked. Oza alleged that both the TDP and TRS were resorting to "unconstitutional means" to stay in power.
The Andhra Pradesh chief minister was caught in a controversy in the wake of some news channels airing an audio recording of a purported conversation Naidu had with a nominated legislator seeking his vote in the Legislative Council elections.