Britain’s National Crime Agency (NCA), often referred to as the country’s FBI, is investigating former City Minister Tulip Siddiq following a discreet visit to Dhaka for a closed-door meeting with investigators linked to the Anti-Corruption Commission (ACC), The Daily Mail reports.

At last month’s meeting, NCA detectives were reportedly informed that the ACC had gathered new evidence against the Labour MP in connection with a controversial nuclear power plant deal.

The revelation suggests that British authorities may scrutinize Tulip Siddiq’s bank accounts, review her email records, and potentially summon her for questioning, according to the report published on Saturday.

The former UK treasury minister and four family members–including her mother Sheikh Rehana–are being probed over claims that they embezzled £3.9 billion from the Rooppur nuclear power plant, which was built by the Russian state-owned company Rosatom with a 90 percent loan from the Kremlin.

Tulip was pictured alongside Vladimir Putin at the signing of the deal in 2013.

Citing official sources in Bangladesh, the Daily Mail said the NCA team had offered to investigate Tulip in Britain to “bring about a prosecution” by the Bangladeshi authorities through an international agreement.

On Friday night, the sources said the NCA may also be trying to gather evidence to bring a prosecution against the Hampstead and Highgate MP in the UK, the report read.

British nationals who are found to have received money abroad as bribes can be prosecuted in the UK under the Bribery Act 2010, and jailed for up to ten years.

Bangladeshi officials, who spoke anonymously, said the NCA had requested the meeting, set up by the British High Commission in Dhaka, the Mail said.

It is the second visit the agency has made to Bangladesh since Tulip’s aunt, Sheikh Hasina, 77, was ousted as prime minister in August after weeks of violent protests.

During its first visit in October, the NCA had offered assistance to the interim government in its efforts to recover the stolen billions that were suspected of being siphoned off by Hasina's allies to countries like Britain, the report added.

However, the three-strong NCA delegation also asked specific questions about Tulip during the meeting.

Tulip resigned as UK minister last month, weeks after the Daily Mail exclusively revealed that she was being investigated over the power plant deal.

Days later, it emerged that Tulip received a two-bedroom flat in London's King's Cross area as a gift from a British property developer linked to her aunt.

The Mail on Sunday then revealed how she had lied to this newspaper in 2022 when it asked her if the flat was a gift.

Tulip denied the claims, saying her parents bought the flat for her, and threatened to sue, the Daily Mail said.

The ACC is conducting at least two other criminal investigations against Tulip and her family. She denies the allegations against her, according to the report.

Labour said: “Absolutely no evidence has been presented for these allegations. Tulip Siddiq has not been contacted on these matters and totally refutes the claims.”

A Labour source said no one from the NCA or the Bangladeshi authorities has contacted her yet, the report added.