Shimla, Aug 5 - The Bharatiya Janata Party (BJP) in Himachal Pradesh Wednesday demanded that Steel Minister Virbhadra Singh resign over the corruption charges filed against him.

'We are demanding the resignation of Virbhadra Singh as his name figures in corruption deals,' BJP spokesperson and legislator Randhir Sharma told reporters here.

'He should submit his resignation on moral grounds. His adamant approach (not to resign) shows his lust for power,' he said.

Virbhadra Singh, a five-time former chief minister, and his wife Pratibha Singh were booked Monday night by the state vigilance and anti-corruption bureau under the Prevention of Corruption Act, 1988.

According to the police, they were booked on the basis of an audio CD released by (Virbhadra Singh's political adversary) Vijai Singh Mankotia in 2007. In the CD, Virbhadra Singh was heard referring to some monetary transactions on the phone with former IAS officer Mahinder Lal, who is now dead. The CD also contained recordings of his wife, a former MP from Mandi in Himachal Pradesh.

Virbhadra Singh has refuted the allegations against him and his wife, calling it as an attempt by the BJP-led state government to malign him.

Mankotia, whose audio CD formed the basis for the graft case against him, has also demanded his expulsion from the cabinet.