As per reports, Syrian Electronic Army has claimed responsibility for this hack. "Don't use Microsoft e-mails(hotmail,outlook),They are monitoring your accounts and selling the data to the governments. #SEA @Official_SEA16," said the Microsoft News Twitter account on Saturday.

Media companies have repeatedly been targeted by the Syrian Electronic Army and other hacker activist groups that deface websites and take over Twitter accounts.

Skype Hack

Earlier, Syrian Electronic Army said it had hacked into Skype's social media accounts. The Internet calling service acknowledged it had been hit with a "cyber attack" but said no user information was compromised.

Messages were also posted on Skype's official Facebook pages and on a blog on its website before being taken down later in the afternoon. Skype is owned by Microsoft Corp.

The Syrian Electronic Army, an amorphous hacking collective that supports Syrian President Bashar al-Assad, later claimed the attack.

The SEA also posted on its Twitter feed the contact information of Steve Ballmer, Microsoft's retiring chief executive, along with the message: "You can thank Microsoft for monitoring your accounts/emails using this details. #SEA"