Mumbai, Jan 13 : In a major embarrassment for the Nationalist Congress Party (NCP), the Narcotics Control Bureau (NCB) is questioning Samir Khan, the son-in-law of Maharashtra Minister Nawab Malik in a drugs case, sources said on Wednesday. According to NCB sources, Khan was asked to appear before the agency in a drugs related case after a few transactions between him and a drug peddler were noticed. The source said he appeared before the drug law enforcement agency on Wednesday morning and his statement was being recorded. The NCB believes that the payments to the peddler were meant for drugs. And, thus he was asked to appear to verify the payments made, the source said. The case relates to the seizure of 200 kg of drugs in Mumbai last week. Malik is the Minority Affairs and Skill Development Minister in the Uddhav Thackeray-led Maharashtra Vikas Aghadi government. Following the news of Khan being questioning by the NCB, former BJP MP Kirit Somaiya took to Twitter and said, "Now damad (son-in-law) of NCP Minister under investigation of Narcotics Control Bureau, involvement in drug scam." In the next tweet, he asked the NCP leader to break his silence and speak. He said, "Nawab Malik Javab Do (answer please)!!" /IANS