On Thursday, Assam Chief Minister Himanta Biswa Sarma stated that an initial investigation revealed Pakistani national Ali Tauqeer Sheikh, allegedly related to Congress MP Gaurav Gogoi's British wife. He has travelled to India 18 times.

While speaking during the discussion on the Motion of Thanks to the governor's speech, Sarma asserted that the initial findings in the case are "very fatal" for the Congress and will have a "huge impact" on Assam's politics.

"Within three days, the Assam Police SIT on the case found that Ali Tauqeer Sheikh visited India 18 times. Now, we will know who invited and hosted him during those visits," he mentioned.

The Chief Minister also mentioned that, based on informal knowledge, the preliminary investigation has uncovered some shocking details that could significantly impact Assam's politics.

"As per the initial information, the facts are very fatal for the Congress party. As a responsible person standing inside the assembly, I am saying this. I promise to the Assam Assembly that we will break the network of Ali Sheikh. Give us three months, and we will inform everything in the August session," he said.

Sarma expressed that the investigation results would put some people in an indefensible position. "Sheikh apparently works in a climate action group. But his tweets and social media activities are on Assam immigrants. These are an attempt to interfere in India's internal affairs," he further said.

The Assam Chief Minister and the BJP have been criticising Gaurav Gogoi, the Deputy Leader of Congress in the Lok Sabha, over allegations that his wife, Elizabeth Colburn, has links to Pakistan’s spy agency, ISI.

On Monday, the Assam Police formed a Special Investigation Team (SIT) to investigate a case against Pakistani national Ali Tauqeer Sheikh for his social media remarks on Assam and India's internal affairs. Sheikh, who serves as an advisor to Pakistan’s Planning Commission and was formerly a colleague of Colburn, has been booked under various sections of the Bhartiya Nyay Sanhita (BNS) and the Unlawful Activities (Prevention) Act (UAPA).

Amid growing controversy over Gogoi’s wife’s alleged ISI connection, the Assam cabinet decided on Sunday not to file any case against the MP or his British spouse. However, the cabinet directed the DGP to register an FIR against Pakistani nationals.

The state government has requested the Centre to investigate Colburn's involvement in Lok Sabha campaigns in the former Kaliabor constituency, where the Congress MP won twice, despite Colburn being a British citizen.

On Tuesday, the Chief Minister clarified that he is not conducting a "witch hunt" regarding Colburn's alleged ties to the ISI, stressing that his only concern is national security, which cannot be compromised in any value.

Before, Sarma took a softer stance on Gogoi, suggesting on Sunday that the opposition leader might be "trapped or blackmailed" in a larger "anti-India" conspiracy and voiced sympathy for him.

Last week, the BJP leader had criticised the Assam MP over allegations of ISI links, accusations of "leading young individuals to the Pakistan embassy for brainwashing and radicalisation, and the refusal to take Indian citizenship for the past 12 years", which refers to Colburn's nationality status in India.

He also claimed that after marrying a British citizen, Lok Sabha's deputy leader of Congress had raised questions in Parliament on sensitive defence matters, an allegation Gogoi dismissed as a "false accusation." The BJP further accused Gogoi's wife of having ties to Pakistan and the ISI, a claim the Congress leader rejected as "laughable and entertaining."

On Friday, Gogoi accused the BJP of going to great heights to malign his and his family's reputation, stating that he would take appropriate legal action. The following day, he shared a post on Facebook, a letter written in Assamese addressed to his wife, reassuring her that the truth would prevail.