The Charanjit Singh Channi-led government selected the 1987 batch IPS officer out of a panel of three officers shortlisted by the Union Public Service Commission.
Last month, the Channi government replaced the state's advocate general A P S Deol after strong opposition from Sidhu.
The DGP told reporters Gagandeep Singh, 31, who was dismissed from service in 2019, had gone to the washroom of the courts complex to assemble the bomb and plant it somewhere.
Shiromani Akali Dal leader Bikram Singh Majithia was on Wednesday questioned for more than two hours by a special investigation team probing a drugs case registered against him.
SAD leader Bikram Singh Majithia, facing arrest in an NDPS case, involving sale, purchase and manufacturing of drugs among other offences, was on Monday granted anticipatory bail by the Punjab and Haryana High Court.
Punjab Bharatiya Janata Party leaders met the governor in Chandigarh on Thursday, demanding the dismissal of the state's home minister Sukhjinder Singh Randhawa and the police chief over the security breach during the prime minister's visit to Punjab.
As per a senior NIA official, the anti-terror agency has "nominated Inspector General of Police Santosh Rastogi to assist the Registrar General of Punjab and Haryana High Court to secure and seize the records related to the visit of Prime Minister to Punjab on January 5, 2022, from State and Central Agencies".
Navjot Singh Sidhu quit as the Punjab PCC chief, triggering other resignations and plunging the party into a fresh crisis just months ahead of the assembly elections.
