The National Investigation Agency (NIA) on December 9 had sought the production warrant of four accused involved in the bomb blast at Pandori Kalan village in Tarn Taran District of Punjab on September 5, reports The Tribune. The NIA senior public prosecutor Surinder Singh had filed an application in the Special NIA court seeking the production warrant of four accused – Gurjant Singh, Massa Singh, Amritpal Singh and Harjit Singh, for reinvestigating them. The court had now issued the production warrant of the accused for December 16.