The Ministry of Defence is investigating a security breach after hundreds of computer log-in details for its employees were stolen and posted on the dark web, The i Paper can reveal.

Emails and passwords belonging to almost 600 UK armed personnel, MoD civil servants, and defence contractors have been stolen by cybercriminal groups since 2020 according to records shown to this newspaper.

It is understood that the information was stolen using Russian hacking software, although there is no evidence the hack was directed by the Kremlin.