MUMBAI: The family was asleep in flat 404 of Reshma Society in Mumbra's Amrut Nagar when the urgent knocks came.It was dark, and men with sophisticated weapons poured in as so on as the door was opened. They searched the house and took along Mudabbir Shaikh, 34, telling his wife he was part of an inquiry.They also took his computer and his mobile phone. Two electronic timer devices and Rs 2 lakh were found in the house and seized.The 20-member joint NIA and ATS team that conducted Friday's operation described Shaikh as the 'chief recruiter' for IS. Across the city in Mazgaon, Hussain Khan, 36, was also detained, and accused of being part of Shaikh's conspiracy . Both have been arrested.Across India, 13 others linked to Shaikh were detained."Among them, Shaikh was the most respected. He was in touch with a foreign handler... He would take instructions from his handler and pass it on to the others. They were all active in a chat room for the last one year," said a source from a security agency.A senior cop said they were intent on terror but it is not clear if they wanted to fight for IS or to fight within India. Shaikh, who lived with his wife and two daughters, aged eight years and nine months, was on the ATS radar for six months."We had information about his links with IS and began monitoring his phone, email and social media chats. His primary job was to identify youths who could be instigated to join IS," said an ATS officer. Shaikh had done BCom and a diploma in computers.Cops are questioning Shaikh about the money and verifying his bank accounts to see if he got it from abroad.Hussain Khan, a resident of Mazgaon, was into gold trading and has been arrested for assisting Shaikh in recruiting people. "Khan was aware of all Shaikh's plans.He was placed under arrest once his role was established," said an officer.