 The arrested were former members of the Students Islamic Movement of India.In the September 2006 incident, police investigations have determined that the explosives contained in these bombings were "a cocktail of RDX, ammonium nitrate and fuel oil – the same mixture used in 7/11", referring to the 11 July 2006 Mumbai train bombings, a terrorist incident for which several Islamist groups are suspects.Since the investigation was still under way, Nasik Superintendent of Police Rajvardhan declined to give details, saying