The Narcotics Control Bureau (NCB) and its zonal director Sameer Wankhede approached a special court here on Monday against the allegations of extortion levelled against them in the cruise drugs seizure case in which actor Shah Rukh Khan's son Aryan Khan is an accused.

Two affidavits have been filed with the NDPS (Narcotic Drugs and Psychotropic Substances Act) special court. The first, filed by the NCB, says the fact Prabhakar Sail filed his affidavit before submitting it to the court shows he has turned hostile.

The second was filed by Sameer Wankhede (in his personal capacity) in response to NCP leader Nawab Malik tweeting a document related to the NCB officer's birth and alleging "forgery". It says: "... have been personally targeted, especially by a known political figure, (since) one Sameer Khan, a relative of this honcho, was arrested in a drug case... from that time there is a personal vendetta..." Wankhede also released a press statement outlining the "composite, multi-religious and secular (nature of his) family in true Indian tradition". "The publishing of my personal documents on Twitter is defamatory in nature and unnecessary invasion of my family privacy. It is intended to malign me, my family, my father, and my late mother," he has said, according to NDTV.com.

The anti-drugs agency and Wankhede in their affidavits also said this was an attempt to create hurdles and scuttle the investigation in the case.

The NCB in its affidavit sought that there should be no tampering with the evidence or investigation, while Wankhede refuted the allegations raised against him.

On Sunday, an independent witness in the cruise drugs case, in a statement to the media, claimed that Rs 25 crore was demanded by an official of the NCB and other persons, including absconding witness K P Gosavi, to let off Aryan Khan in the case.

Prabhakar Sail, the 'independent witness', told media persons that he had overheard Gosavi telling one Sam D'Souza over the phone, after Aryan Khan was brought to the NCB office following the October 2 raid, about a demand of Rs 25 crore and "to settle at Rs 18 crore as they have to give Rs eight crore to Sameer Wankhede".

Sail had said he would soon release evidence to support his claim.

The NCB and Wankhede rubbished these claims in their affidavits submitted to the court on Monday.

Wankhede on Sunday also wrote to Mumbai Police Commissioner Hemant Nagrale, seeking protection from likely legal action "being planned" against him by unknown persons to falsely frame him concerning an alleged vigilance related issue.

Without taking names, Wankhede, an IRS officer of the 2008 batch, had claimed in his letter to Nagrale that the threat of jail and dismissal have been issued against him on public media by highly respectable public functionaries.

An NCB team led by Wankhede earlier this month allegedly seized drugs onboard a cruise ship off the Mumbai coast following which Aryan Khan was arrested on October 3.

He is currently lodged in the Arthur Road jail in Mumbai. His bail application is likely to be heard by the Bombay High Court on Tuesday.