New Delhi, March 26 :    New Delhi, March 26:  As members of the ruling alliance and the Opposition clashed over the anti-terror Bill in Parliament, a CPM MP held a press conference outside to attack the BJP. The subject was unusual: sex calls allegedly made by Satyabrata Mukherjee, the BJP minister of state for chemicals and fertilisers and Krishnagar MP, from his official telephone. Biplab Das Gupta, a CPM Rajya Sabha MP, charged Mukherjee with draining the exchequer with his 'dirty calls' and demanded his resignation. Thirty-four such calls were made on October 2, Mahatma Gandhi's birthday. 'The minister seems to be spending nights doing nothing but making dirty phone calls,' he told the press conference. Mukherjee denied making the calls. Sex calls are charged at international rates. The CPM MP reeled off the phone numbers of these call stations. He has also sent a letter to Prime Minister Atal Bihari Vajpayee claiming documentary evidence against Mukherjee. 'At a time when the government is talking about Lord Ram, Ayodhya, the greatness of Hindutva, the perfidy of Pakistan, how can a minister indulge in deriving sexual pleasure from his office?' he wrote. The CPM MP listed the minister's telephone number from which the calls were made. He said that 10 such calls, five each to two numbers, were made on October 1, 2000; 34 calls were made to several sexlines on October 2; 17 calls were made to three numbers between midnight and 8.43 am on October 3. '...These calls are punctuated, before, after and in the middle of these calls, by calls to the residence, presumably whenever his conscience was shaken by those,' he wrote. Mukherjee said he could not be held responsible 'if any of my employees made any such calls without my consent'. The minister claimed that most of the calls were made at a time when he was not in Delhi, adds PTI. The CPM MP had not ruled out the possibility that someone else in the Mukherjee household might be making these phone calls. But, he said, even if that were true, it did not acquit the minister of the charge of bleeding the government exchequer. The CPM MP added that Mukherjee, who is little known outside his circle, 'had made these calls as an MP from West Bengal and continues to do so as a minister'. Das Gupta also claimed that he had evidence to prove that the minister used funds of sick public sector units to make trips to Ranikhet and Tirupati. 'At a time when ordinary people struggle to find food and shelter, here you have a minister who wastes public money in lakhs whetting his sexual appetite,' Das Gupta wrote.