The militant was earlier a top operative of the Sikh separatist group Khalistan Commando Force (KCF). Later he joined terrorist outfit Babbar Khalsa International (BKI) and became its operational head. In recent years, the Punjab Police have foiled attempts by some groups linked to terror outfits to revive terrorism in the state, which had witnessed a prolonged period of terrorism from 1981 to 1992. "Rattandeep Singh was the kingpin of a group of militants who had planted explosives in a vehicle in Amritsar near Circuit House in May 2010 and for that purpose, he had smuggled in a consignment of weapons and explosives from across the border (Pakistan)," the spokesman said. With the arrest of Rattandeep Singh, all the operatives of the terrorist gang involved in the plan have been arrested. Rattandeep Singh is wanted in several militant offences in Punjab, Haryana and Chandigarh.