The hackers suspected of stealing 6.5 million LinkedIn passwords also stole 1.5 million passwords from dating site eHarmony, according to a report.

The hacker, who posted lists containing a total of eight million passwords on a web forum run by a company in Moscow that specialises in ‘password recovery’ software, uses the online alias “dwdm”.

The hacker appealed to fellow hackers for help converting the passwords into a usable form.

According to experts, the fact that some of the passwords included the phrase “eharmony” indicated they were taken from the online dating website, which has over 20 million members across the globe, The Telegraph reports.

The firm confirmed that its security had been breached after it was first reported by the technology news website Ars Technica.

“After investigating reports of compromised passwords, we have found that a small fraction of our user base has been affected,” it said in a blog post.

The company said it would contact affected members and reset their passwords.