The National Investigation Agency took over the case, registered under various sections of Indian Penal Code, Unlawful Activities (Prevention) Act, Explosives Act and Prevention of Damage To Public Property Act, in January this year. "Harpreet Singh alias 'Happy Malaysia' is wanted by the NIA in connection with the case related to conspiracy hatched by ISYF for causing a blast at Ludhiana court complex on December 23, 2021.