Risk: Informational
Computer hackers have targeted the job section of the Guardian newspaper website in a "sophisticated and deliberate" move, the company has said.
The breach put the personal details of some users at risk. Those who may have been affected have been identified and e-mailed.
The Guardian said it had since been "assured" by the supplier that runs the site that the system was now secure.
Officers from the Metropolitan Police e-crime unit are investigating.