A copy of the database with millions of leaked Facebook data, including phone numbers, can be found online, a security researcher told CNET on Friday.

According to the researcher, it is "almost certainly the same data" as the data from the Wednesday discovered database. This database is said to contain data from more than 400 million Facebook users.

The data from the database was probably collected by a third party from Facebook and subsequently put online unprotected, making it freely accessible. People who appear in the database can, among other things, become victims of identity fraud.

"Databases of this size are rare and it is clear that the data from the two databases match," says the researcher who discovered the alleged copy of the database against CNET .

The American news site also found the data of Facebook founders Mark Zuckerberg and Chris Hughes in the database. The alleged telephone number of Zuckerberg immediately led to voicemail, while the person behind the other telephone number claimed to have received this number earlier this year.