IB director Asif Ibrahim's letter states, joint director SIB had verbally told Ahmedabad Police Commissioner that two Pakistani terrorists with a Punjabi accent are active inside Gujarat, and a Pune-base Indian was helping them.
The IB letter also mentions inputs received from FBI's interrogation of 26/11 accused David Headley in Chicago. The letter says, Headley had told FBI that Ishrat Jahan was a female suicide bomber of Lashkar-e-Toiba, who was inducted by LeT commander Muzammil.
The letter says, FBI had arrested the US citizen of Pakistani origin David Headley in September 2009 for his close association with LeT.