He also lashed out at veteran Congress leader Ambika Soni for her statement on the "repercussions of having a Hindu chief minister in Punjab".
The explosion took place in the wash room of the second floor of the court complex, said police.
The former Punjab Congress chief had been upset with the party for serving him a show-cause notice.
About 16,000 Indians, mostly students, are stranded in Ukraine as Russia's invasion of the east European country entered its second day on Friday. Of the students, many studying medicine in Kharkiv and Kyiv, about 2,500 are from Gujarat and 2,320 from Kerala.
Making the announcement at a press conference in Chandigarh, Sidhu, however, said he will assume charge the day Punjab will get a new advocate general.
Punjab Congress president Navjot Singh Sidhu on Wednesday once again trained his guns on former state chief minister Amarinder Singh, calling him a 'fraud,' 'coward' and a 'crybaby.'
The Union government had recently amended the BSF Act to authorise the border guarding force to undertake search, seizure and arrest within a 50 km stretch, up from the existing 15 km, from the international border in Punjab, West Bengal and Assam.
'People of my constituency told me they will continue loving me, but will not vote for me if I am with the BJP.'
With its landslide victory in Punjab assembly polls, the Aam Aadmi Party has achieved a major milestone in its journey so far and emerged as an alternative in the national politics.
Several Punjab Congress leaders, including Navjot Singh Sidhu, were on Thursday prevented from heading to Lakhimpur Kheri and were detained at a police station in Saharanpur in Uttar Pradesh.
"The two (the Pradesh Congress Committee chief and the chief minister) consult each other, but the final decision is of Channi, who is the chief minister, not Sidhu," the former chief minister told reporters at the Chandigarh airport.
'Sidhu's suggestions regarding formation of the new government were completely ignored, so he stepped down.' 'Channi's government is walking on the same path as Amarinder Singh's.'
Congress leader Charanjit Singh Channi was on Monday sworn in as the chief minister of Punjab, making him the first Dalit to hold the top post in the state.
A day after Punjab Advocate General A P S Deol accused Navjot Singh Sidhu of spreading misinformation and obstructing him, the state Congress chief on Sunday hit back, alleging that the AG's 'earnest inaction' was subverting justice in the sacrilege and drug cases.
Governor Banwarilal Purohit administered the oath of office and secrecy to the 10 ministers at Punjab Bhawan in Chandigarh.
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.
Actor-philanthropist Sonu Sood's sister Malvika Sood on Monday joined the Congress, with Punjab Chief Minister Charanjit Singh Channi batting for her candidature from Moga for the February 14 assembly polls.
'It will impact the 2024 Lok Sabha elections.'
"A hundred years ago, Britishers had called Bhagat Singh a terrorist and 100 years later, history is repeating when all these parties want to prove Bhagat Singh's follower (Kejriwal) as a terrorist, but people know the reality," he said.
Singh said he had worked as prime minister for 10 years and had always preferred that his work should speak for itself.
Mahatma Gandhi was a Hindu and Godse was Hindutvadi, the Congress leader said.
An adverse outcome against the BJP in UP can well be taken into its stride by the ruling combine at the Centre, argues Virendra Kapoor.
Congress leader Rahul Gandhi on Thursday said the party will go into the Punjab assembly polls with a CM face and the decision on it will be taken soon after consulting party workers.
The BJP IT cell has held meetings right down to booth levels and these volunteers have been working for the past six months already.
A dominant force in the country's politics for decades, the grand old party's free fall continued as it lost Punjab to AAP and finished with just two seats out of 403 in the politically crucial state of Uttar Pradesh.
At many places, where the voters had entered booths before 6 pm and were standing in queues, they were allowed to cast their votes.
Congress leaders Rahul Gandhi and Priyanka Gandhi Vadra Wednesday met the family members of farmers killed in the violence in Lakhimpur Kheri and promised them all assistance.
Senior party leader P Chidambaram, Chhattisgarh Chief Minister Bhupesh Baghel, Punjab Chief Minister Charanjit Singh Channi and Shiv Sena leader Sanjay Raut expressed support to Priyanka, who has alleged that no notice or first information report (FIR) has been given to her even after her 38-hour detention and was not allowed to meet her legal counsel.
Amid the ongoing crisis within the Congress in Punjab, its national spokesperson Supriya Shrinate on Friday expressed the hope that its leaders "talk more in private and less in public."
As state-level leaders tried to placate Sidhu, he made it clear through the video that he was in no mood to budge on his 'principles'.
'The fight is between the Congress and Akali Dal.'
Punjab BJP chief Ashwani Sharma said a large number of buses and other vehicles carrying BJP workers and other people were prevented from reaching the rally site.
The four ministers -- Tript Rajinder Singh Bajwa, Sukhbinder Singh Sarkaria, Sukhjinder Singh Randhawa and Charanjit Singh Channi -- and around two dozen legislators met in Chandigarh at the residence of Bajwa on Tuesday.
The letter to Sonia Gandhi reminded her of the party's 18-point agenda "given to the last chief minister" of Punjab and said that those were "equally relevant today".
Some reports suggest that the Centre has empowered the BSF to conduct searches, arrest suspects and make seizures up to an area of 50 km inside the Indian territory from the international border.
Sidhu and Amarinder Singh has been at loggerheads for the past some time, with the Amritsar (East) MLA recently attacking the CM over the desecration cases.
Revenge he will exact from a party he had led with great aplomb until the Gandhi siblings stepped in and, in order to show who was the boss, flung him aside, observes Virendra Kapoor.
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.
Nearly five years ago when he joined the Congress, ex-cricketer Navjot Singh Sidhu had said he is a 'born Congressman' now coming back to his roots.
After the Opposition, now Punjab Congress chief Sunil Jakhar and two MLAs of the party have questioned their government's decision of giving jobs to sons of two legislators and urged Chief Minister Amarinder Sigh to roll back the 'ill-advised' move.