Additional District and Sessions Judge R K Sondhi handed down the sentence to Bheora, who headed the terrorist outfit's operations in India and was arrested in 1997, after he was held guilty for criminal conspiracy and for his involvement in killing of Singh in a car blast on August 31, 1995 at the high-security Punjab civil secretariat complex.
Three suspected Babbar Khalsa terrorists were arrested in north-west Delhi early Monday morning, police sources said.
While describing them "martyrs" of Sikh community, the Akal Takht jathedar asked the Shiromani Gurdwara Parbandhak Committee to install portraits of Hardeep Singh Nijjar, Paramjit Singh Panjwar and Gajinder Singh.
The Punjab police also recovered huge quantity of explosives and a massive cache of sophisticated arms and ammunition.
Narain Singh Chaura, a former terrorist with a history of violence and involvement in the 2004 Burail jailbreak case, attempted to shoot Shiromani Akali Dal leader Sukhbir Singh Badal outside the Golden Temple. The attack, which occurred while Badal was sitting in a wheelchair, was thwarted by quick action from security personnel. Chaura has been arrested and is facing multiple charges, including under the Unlawful Activities (Prevention) Act.
Radical preacher Amritpal Singh, who is on the run following a police crackdown, has been maintaining close links with Pakistani intelligence agency Inter-Services Intelligence (ISI) and some terrorist groups based abroad, official sources said on Saturday.
Babbar Khalsa militant Jagtar Singh Tara, convicted for life in the then Punjab Chief Minister Beant Singh's assassination, was brought in New Delhi on Friday night by a team of Punjab Police after being extradited from Bangkok.
The home ministry said these individuals are operating from Pakistan and other foreign soil and involved in various acts of terrorism.
Jagtar Singh Hawara, a Babbar Khalsa International terrorist and his associates Jagtar Singh Tara and Paramjit Singh, all three accused in the murder for former Punjab chief minister Beant Singh, escaped after digging a tunnel in the jail.
Amritpal Singh, the chief of the 'Waris Punjab De' outfit, who is lodged in Assam's Dibrugarh jail under the National Security Act, has thrown his hat into the ring as an Independent.
Prime Minister Narendra Modi is likely to ask Britain to take strong action against Sikh groups trying to revive the demand for a separate Khalistan and their attempts to radicalise Sikh youth besides giving them training on how to make bombs.
The unidentified youths shot Nijjar, a designated terrorist, inside the premises of Guru Nanak Sikh Gurdwara Sahib, of which he was the head, at Surrey at 8:27 pm (local time) on Sunday, they said.
Amritpal Singh and others are on the run and a massive manhunt has been launched to nab them, a police spokesperson said.
Police have already arrested Bikramjit Singh, an operative of militant organisation Khalistan Liberation Force who was allegedly driving the motorcycle on that day.