LUCKNOW, April 20 -- Babbar Khalsa International (BKI) operative Harpreet Singh alias Happy Passia, who was arrested by the Federal Bureau of Investigation (FBI) earlier this week for allegedly entering the US illegally, is also wanted in the case of a foiled plan to carry out terror attacks in Uttar Pradesh during the Mahakumbh that was held in Prayagraj between January 13 and February 26 of this year, confirmed UP Police's additional director general (ADG)-law and order Amitabh Yash on Saturday....