Half a million user accounts are affected in a web attack on the Guardian Jobs site this weekend.

In a statement on its site and in an email to all Guardian Jobs account holders, the site says the hack has been reported to the Police's central e-crime unit.

The e-version of the newspaper hasn't lost any bank or financial details according to the Guardian.

In the statement, the company says this is a "deliberate and sophisticated crime and... only a minority of Guardian users are at risk."

The Police are keeping information on the online theft to a minimum for the sake of investigations.