Punjab Chief Minister Captain Amarinder Singh on Wednesday said that one of the persons involved in Amritsar blast has been nabbed by the police. "I'm happy to announce that police have nabbed one of the two persons involved. 26-year-old Bikramjit Singh has been arrested. The other man will also be arrested soon. His name is Avtar Singh", said CM during a press conference today. At least three people were killed and 20 were injured after grenade was lobbed by bike-borne assailants last week at Nirankari Bhawan in Amritsar.