New Delhi, Aug 19 - Senior leader Jaswant Singh has been expelled from the Bharatiya Janata Party (BJP) for his book praising Mohammad Ali Jinnah, the founder of Pakistan, but this is not the first time his writings have touched off controversy.

In his previous book titled 'A Call to Honour: In Service of Emergent India in 2006', he alleged that there was a mole in the Prime Minister's Office in the nineties during the tenure of P.V. Narasimha Rao of the Congress who leaked information to American sources.

Soon after the release of the book, Prime Minister Manmohan Singh disputed this and asked him to name the mole.

Jaswant Singh then said he had sent him a letter, but Manmohan Singh said the letter neither had any signature nor the name of the mole.