The National Investigation Agency (NIA) has detained another suspect from Kishtwar in Jammu and Kashmir for the September 7 blast outside the Delhi High Court that killed 15 and injured 80. Agency officials say the suspect,Wasim,is one of the key conspirators and has been studying in Bangladesh. Calling his detention a major breakthrough,they claim Wasim and four others hatched the plot in Bangladesh and took the help of his local contacts in Kishtwar. The agency is now working on the theory that Wasim was lured by the Harkat-ul-Jehadi Islami in Bangladesh and his network in Jammu was used to send the e-mail claiming responsibility for the attack. NIA officials believe that with Wasims arrest,they can trace the conspiracy and the men behind the blast. It is through the process of elimination during the interrogation of Aamir (Abbas) that we managed to reach Wasim. He appears to be the key link, said an official. Wasims will be the third arrest in the case. The agency had earlier arrested Aamir Abbas and Abid Hussain,both residents of Kishtwar. Abid was arrested for sending the terror e-mail three hours after the incident.