A report into alleged Russian interference in the UK democratic process is not set to be published until after the general election.
The development comes after the chairman of the Parliamentary Intelligence and Security Committee (ISC), Dominic Grieve, called on Number 10 to clear its report for release before Parliament is dissolved on Wednesday.
However, the Prime Minister's official spokesman indicated the necessary clearance process has yet to be completed.
"There are processes reports such as this have to go through before publication. The committee is well-informed of these," the spokesman said.
The ISC oversees the work of the agencies MI5, MI6 and GCHQ.
In the course of its work has access to highly sensitive intelligence material.
Its reports are submitted to the Government before publication, to ensure no sensitive information is inadvertently made public.
Mr Grieve, a former attorney general who now sits as an independent after losing the Tory whip, has said the process was normally completed within 10 working days.
However, this was disputed by Government sources who said that it usually took six weeks.
Mr Grieve has expressed concern that the document, which is reported to have looked into whether Russian interference affected the result of the 2016 EU referendum, contained information "germane" to voters in the forthcoming election.
Reporting by PA
