In Bihar, sleuths of National investigative Agency, Intelligence Bureau and other agencies have started interrogating three arrested persons Umashankar Patel,Motilal Paswan and Mukesh Yadav at Motihari in connection with involvement of Pakistan's ISI behind Kanpur train mishap. <br/><br/>The three have been taken on six day police remand. Investigative agencies are inquiring all aspects of the incident. Sources said the trio had confessed to their involvement in engineering the accidents. <br/><br/>Superitendent Police of East Champaran Jitendra Rana said three persons Brij Kishore Giri, Shambhu Giri and Mujahir Ansari were arrested by Nepal Police in this regard. <br/><br/>Mr. Rana said Brij Giri was the ISI link through another Nepal citizen Shamshul Huda in Dubai to carry out terror activities in India. He said three persons in Motihari were arrested on the information from Nepal Police. <br/><br/>Altogether 151 passengers were killed in accident of Indore- Patna train accident on November 21 while over 200 were injured following derailment of Ajmer -Sealdah Express on December 28.