As an immediate fall out of the FBI foiling a LeT plot to use US nationals to carry out major terror attacks in India, the Indian Embassy in Washington has tightened visa approval norms for Pakistan-born American citizens. <br/><br/>An instruction in this regard has been issued by Home Secretary G K Pillai, according to which all applications for Indian visa from Pakistani-born US nationals would now be processed and cleared by New Delhi.<br/><br/>The measure has been taken in view of the busting of the Lashkar-e-Toiba plot, in which the Pakistan-based terror group was planning to use Pak-born US national David Coleman Headley to launch terrorist attacks in India. <br/><br/>All the Indian Missions in the US have been directed to adhere to the new instructions in this regard from New Delhi.<br/>