According to a former diplomat, stolen emails from an SNP MP were obtained.
Craig Murray claimed that despite not being involved in the initial hack, he secured Stewart McDonald's emails after making a number of inquiries.
Now, Mr. Murray has vowed to publish content that he believes to be impartial and in the public interest.
The SNP and Mr. McDonald have been contacted by BBC Scotland for comment. According to Police Scotland, it had received a report and was evaluating it.
The cache allegedly contained emails between Mr. McDonald and Scotland's First Minister Nicola Sturgeon, according to Mr. Murray, a steadfast critic of the SNP leadership.
On Wednesday, the Glasgow South MP told the BBC that his emails had been stolen last month and that he was worried they would be made public.
The perpetrators are allegedly connected to Russia's spies.
In recent weeks, the UK's cyber-defence agency has issued warnings about targeted attacks on politicians.
As he waits to see what the hackers do with the stolen data, Mr. McDonald, the former defense spokesman for the SNP, said he made the decision to go public to alert others to the dangers and mitigate any potential harm.
But on Friday, Mr. Murray asserted that he still had the politician's lost emails.
He wrote on his blog: "I have access to all of Stewart McDonald's emails after contacting several people to find out who might have them.
"Neither the emails' acquisition nor my prior knowledge was my doing. They have been so kindly shared, and I am appreciative.
Nothing purely personal about Mr. McDonald, insisted Mr. Murray, wouldn't be revealed.
Additionally, he stated that all information pertaining to the MP's constituents "will remain absolutely and properly confidential.".
Mr. Murray stated his intention to publish information that he believed to be in the "legitimate public interest.".
These interactions included those with NATO, the Ministry of Defense, parliamentary panels, intelligence services, and foreign governments.
Because of blogs he wrote about Alex Salmond's trial, Mr. Murray was given an eight-month prison sentence in May 2021.
A number of articles about the former first minister's High Court trial in 2020 were published online by the ex-ambassador.
His writing might allow complainers to be identified, violating a court order, according to the concerns of the prosecution.
Last March, Mr. Murray lost a legal challenge to his sentence.
"A report has been received and is being evaluated," a Police Scotland spokesman said.
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