The National Investigation Agency (NIA) has arrested absconding December 2021 Ludhiana Court building blast conspirator and wanted terrorist Harpreet Singh from Delhi airport soon after his arrival from Kaula Lumpur, Malaysia, the agency said on Friday.

An associate of Lakhbir Singh Rode, a Pakistan-based self-styled Chief of the International Sikh Youth Federation (ISYF), Harpreet was one of the conspirators of the December 2021 Ludhiana Court Building blast alongwith Rode. One dead and six were injured in the massive bomb blast.