Mann made the claim while addressing a gathering after laying foundation stones for setting up tehsil complexes at Dirba and Cheema in Sangrur.
Moreover, the CEO said that citizens can also lodge complaints through the cVIGIL application, where the complaint needs to be addressed within a 100-minute time frame.
Gandhi was abroad when the killing took place and returned over the weekend.
A purported video of the entire incident also surfaced on social media. Police have lodged an FIR in the matter after an order by Mann on Saturday. The chief minister termed the incident as an "inhuman crime" against the people of the state.
After a resounding victory in Punjab polls, the Aam Aadmi Party will hit the ground in Himachal Pradesh and Gujarat which will go to polls in November this year.
On Wednesday, Punjab Governor Banwarilal Purohit will swear Bhagwant Mann as Punjab's first AAP chief minister at Khatkar Kalan, the ancestral village of iconic freedom fighter Shahid Bhagat Singh.
The chief minister accused the Governor of interfering in the state government's affairs and, replying to Purohit's letter made public Monday, indirectly questioned his credentials for the post.
From a comedian to Punjab chief minister, Bhagwant Mann has seen a phenomenal rise in a political career of just over a decade.
"Opinions of candidates, workers, and party MPs are being recorded to so that any feud over the CM face between Channi and Navjot Singh Siddhu can be avoided," said sources.
The Punjab chief minister said he was asked by Kejriwal to visit different places for campaigning for INDIA bloc candidates.
The Aam Aadmi Party on Friday named former TV anchor and journalist Isudan Gadhvi as its chief ministerial candidate for next month's assembly elections in Gujarat.
The governor's approval came a day after the AAP government informed him about the issues to be taken up during the session.
The police have put up barricades, tippers and rolled out water cannons to prevent protesting farmers from entering Chandigarh.
The meeting was attended by CMs of Kerala, Punjab and Telangana -- Pinarayi Vijayan, Bhagwant Manna and A Revanth Reddy, Karnataka deputy CM DK Shivakumar, and senior BRS leader KT Ramarao among others.
Punjab Chief Minister Bhagwant Mann on Thursday announced that his government will launch an anti-corruption helpline number on March 23 that will allow people to upload videos of corrupt officials asking for a bribe or indulging in other malpractices.
Amid a tussle with the Aam Aadmi Party government, Punjab Governor Banwarilal Purohit on Tuesday told the Supreme Court that he has summoned the assembly for the budget session on March 3, even as the top court told both sides that constitutional discourse has to be conducted with a sense of decorum and mature statesmanship.
Aam Aadmi Party candidate Sushil Rinku on Saturday won the Jalandhar Lok Sabha by-election, defeating his nearest rival and Congress nominee Karamjit Kaur Chaudhary by a margin of 58,691 votes.
A Mohali court on Friday sent to 14-day judicial custody sacked Punjab minister Vijay Singla, who said he worked with 'utmost sincerity', has full faith in his party and will come out clean of corruption charges.
Farmer leaders participating in the 'Delhi Chalo' agitation on Friday said the cremation of Shubhkaran Singh, who died amid clashes between Haryana Police and Punjab farmers, will not take place till the Punjab government registers a case against those responsible it.
The other main contender for the party's CM face was Punjab Congress chief Navjot Singh Sidhu, a Jat Sikh face.
A bullet each hit Singh in the head and near the chest. Singh was rushed to a private hospital, police said. He is currently out of danger.
The new timing will remain in force till July 15 and result in an estimated saving of Rs 40-42 crore during the two-and-a-half month period, said Mann who, along with his staff, arrived at the Civil Secretariat in Chandigarh at 7.28 am.
A meeting of Aam Aadmi Party MLAs will be held on Tuesday morning, and Delhi Chief Minister Arvind Kejriwal is likely to tender his resignation after it, the party said.
The victim was a farmer apparently taking part in the protest in the district's Longowal area, where police were trying to stop protesters from blocking a national highway and a toll plaza, officials said.
Delhi and Punjab are ruled by the AAP and these are the only two states that have free electricity supply, he said.
he Punjab government had also sought a judicial declaration that the assembly session held on June 19 and 20 was "legal and that the business transacted by the House is valid".
A day after his release on interim bail, Delhi Chief Minister Arvind Kejriwal launched a blistering attack on Prime Minister Narendra Modi, alleging he was on a 'One nation, One leader' mission to impose 'dictatorship' by putting all leaders from opposition behind bars and 'politically finishing off' those in the Bharatiya Janata Party.
The Supreme Court on Friday termed the deadlock between the Punjab government and its governor over assent to bills passed by the assembly a matter of "serious concern" and said it is not happy with what is happening in the state.
Hours after taking a 'U-turn' by informing the high court that it is withdrawing its notification dissolving all gram panchayats in the state, the Punjab government suspended two senior Indian Administrative Service (IAS) officers on Thursday for a 'technically-flawed' decision.
In a strong response to the Union home ministry's letter on the ongoing farmers' agitation, the Aam Aadmi Party dispensation in Punjab on Wednesday wrote to the Centre saying it is 'completely wrong' to claim the state government was allowing gathering at the two border points with Haryana.
Punjab government on Friday said that the Centre was making all efforts to locate the whereabouts of the 39 Indian youths who had been held hostage for nearly a year by ISIS militants.
Governor Banwarilal Purohit administered the oath of office and secrecy to the 10 ministers at Punjab Bhawan in Chandigarh.
"The Punjab government is running just like the Modi government. Doing headline management to hide its failure. After winning on the slogan of bringing change, it is doing politics of revenge," he also said in a tweet.
Delhi Chief Minister and Aam Aadmi Party national convener Arvind Kejriwal on Friday met Shiv Sena (UBT) head Uddhav Thackeray at the latter's residence in Bandra in suburban Mumbai.
Delhi Chief Minister Arvind Kejriwal's unexpected announcement on Sunday that he will resign after two days drew mixed reactions from parties, with some saying it was a compulsion due to bail restrictions on his functioning and others hailing it as a right call to go back to the people.
The Congress high command has so far maintained that the party will fight the February 20 elections to the 117-member assembly under a "collective leadership"
Kejriwal, who is the AAP national convener, asserted that the people of Punjab are fed up with the present leadership ruling the state and added that the state is looking for a new type of leadership.
Mann said blocking roads by holding sit-ins had become a "trend" during the past few days, taking on the farmers' unions virtually head-on in an uncommon thing for any chief minister of the agrarian state.
For the last several weeks, both Channi and Sidhu have, directly or indirectly, made a case to be declared as the party's nominee for the top post.
Seerat Kaur and Dilshan flew down from their home in California to attend their dad's swearing in.