The BJP on Saturday asked if the Congress government in Rajasthan resorted to "unconstitutional" methods to tap phones of politicians and demanded a CBI probe into what it called a "saga of illegalities and concocted lies". BJP spokesperson Sambit Patra hit back at the Congress a day after it cited some audio clips to accuse some saffron party leaders, including Union minister Gajendra Singh Shekhawat, of conspiring to topple the Ashok Gehlot government in the state.