Bangalore: Close on the heels of Shoaib Akhtar's book launch function being cancelled in Mumbai, another function which was to be attended by the Pakistani speedster on Tuesday for promotion of his controversial biography has also been called off.

The launch of the book was to be hosted by Landmark and HarperCollins Publishers India in the evening but has now been called off, a communication from the organisers said on Monday without giving any reason.

Sources said that the event has been cancelled because of unforeseen circumstances.

Two of Akhtar's promotional events in Mumbai had been cancelled though no official reasons were given.

Former India skipper Dilip Vengsarkar was to release Akhtar's biography " Controversially Yours" at the Cricket Club of India (CCI) premises on Sunday.

According to speculation, the cancellation of the event could be due to less-than-flattering remarks in his biography about iconic batsman Sachin Tendulkar and another senior player Rahul Dravid.

In his tell-all biography, Akhtar has made many controversial claims.

Akhtar has written that Sachin lacked the ability to finish matches in the initial stages of his career.

He drew flak for his comments from several quarters, including former Pakistan skipper Wasim Akram, under whom he made his debut and senior BCCI functionary Rajiv Shukla who wanted an apology from the speedster.