NEW DELHI: Wiping out the top leadership of terrorist outfit Indian Mujahideen IM ), the special cell of Delhi Police arrested Tehsin Akhtar alias Monu on Tuesday.Sources said he was nabbed near the Nepal border but there was no official confirmation yet. Akhtar was apparently trying to sneak into Pakistan via Kathmandu.Tehsin, for all practical purposes, took over the reins of IM in India after its then operations chief Ahmed Siddibappa alias Yasin Bhatkal was arrested by Intelligence Bureau in Nepal in August 2013.A highly motivated and slippery IM operative, Tehsin was wanted for a series of blasts across the country, including the October 27, 2013 attack on a Narendra Modi rally in Patna.An attempt by intelligence agencies to prod him to surrender through his parents in Samastipur, Bihar was rejected by Tehsin with a terse message that said, "I am not a misguided youth. I know what I am doing."Tehsin was also wanted for the Varanasi blasts in 2010, triple blasts in Mumbai in 2011, Pune blasts on August 1, 2012, Hyderabad's Dilsukhnagar blasts in February 2013 and Bihar's Bodh Gaya blasts in July 2013.An early recruit of IM's Darbhanga module, Tehsin is a close associate of Yasin Bhatkal and has not only been a planter of many bombs but also a motivator for the outfit. Apart from Yasin, Tehsin used to scout for young Muslim men in a Darbhanga library and indoctrinate them by talking about atrocities against Muslims and preaching a puritanical and fundamentalist version of Islam.It was Tehsin who established the Ranchi module which was behind both Bodh Gaya and Patna blasts. The Rajasthan module busted by agencies with the arrest of Waqas and three others on Saturday was also indoctrinated by Tehsin.Son of a small-time chemist from Maniyarpur village in Samastipur, Tehsin has remained an evasive blob on the radars of security agencies for several years. He escaped from a flat that he shared with Waqas in Mangalore after news of Yasin's arrest was leaked to the media in August last year.His meteoric rise in the jihadi ranks came within three years of joining IM and partnering Bhatkal in planting bombs in Varanasi in 2010. Intelligence agencies believe that IM founder in Pakistan Riyaz Bhatkal developed sufficient confidence in Akhtar to let him carry out serial bombings in Hyderabad on his own last year. He carries a reward of Rs 10 lakh on his head.Tehsin Akhtar was detained by IB ten days ago at India-Nepal boarder, according to a source.The Indian agency used his electronic instrument to communicate with his associate, Waqas, on Skype and lured him into their trap last week.The IB asked Waqas to reach Rajasthan from where the Delhi police had arrested him along with three others last week. Till his arrest, Waqas, was not aware that Monu was caught and that IB officers were communicating with him on Skype.The source stated that Waqas travelled to Mumbai from some unknown place and headed to Rajasthan.However, Delhi Police disclosed that they first arrested Waqa then Monu on Tuesday.The source stated that Monu is big catch for the Indian agency as he was a leading IM in India since last two years.Before Monu, Yasin Bhatkal was leading IM operations in India. The Indian agency managed to arrest Yasin last year from India-Nepal border.