Sony was today reeling from yet another data leak after hackers broke into one of its sites and accessed name, address, birth dates, emails, phone numbers and password data on more than 1 million customers who entered contests promoted by Sony.

A group calling itself 'LulzSec' said it hacked servers that run Sony Pictures Entertainment websites.

In a statement, LulzSec boasted: "From a single injection, we accessed EVERYTHING... Why do you put such faith in a company that allows itself to become open to these simple attacks?"

In a statement Sony said it was investigating the breach.

The attack comes just two months after hackers accessed personal information on 77 million Sony PlayStation Network and Qriocity accounts. Sony had announced the restoration of the PSN only in the past week.

Nobody has claimed responsibility for the April attack, in which Sony admitted that credit card information may have been stolen.

See also: How to deal with the PlayStation Network hack