The UK Parliament was the target of what is described as a "firm and resolute" cyber hacker aggression that started at the weekend, with local officials confirming that external access to e-mail has been ruled out as a security measure.
Parliament has already contacted all members to warn of the security risks after the cyber attacks and explained that research is in progress.
"Earlier this morning, we uncovered unusual activity and evidence of a cyberattack business on our computer network," the email alert said in The Guardian.
"Closer research by our team confirmed that hackers were making a firm and decisive attack on all parliamentary user accounts. We have worked closely with the National Cyber Security Center to identify the method of attack and we've made changes to prevent intruders from gaining access. "
Its new cyber attacks come just days after reports from the British media revealed that the accounts, including passwords, British police and parliamentary staff were available for online purchase after they were stolen by Russian hackers.
According to information, accounts are at stake as part of the 2012 LinkedIn data breach and concern millions of users. The National Cyber Security Center (NCSC) is now advising thousands of government officials to change their codes as soon as possible to make sure they do not have access to their data.
At least 1.000 British MPs and parliamentary members are said to be affected, along with more than 1.000 members of the Foreign Ministry.
Although all users were advising to change their passwords shortly after information received by the authorities about their data breach LinkedIn 2012 last year issued another warning when Russian hackers tried to sell credentials which allegedly belonged to British officials.
So far, there are no reports of compromised data since the recent cyber attack, and there are no details about restoring remote access to the network.