The social media platforms of Skype have been hacked by a group claiming to be the Syrian Electronic Army (SEA).
The group posted anti-surveillance messages, including a message telling people not to use email services of Microsoft, the owner of Skype.
It claimed “they are monitoring your accounts and selling the data to the governments”.
The hack comes after recent revelations about surveillance programmes being run by US intelligence agencies.
“Don’t use Microsoft emails (hotmail, outlook). They are monitoring your accounts and selling the data to the governments,” the hackers posted on Skype’s Twitter account and its blog.
The post has since been removed.
Skype acknowledged that it had been hacked but said that “no user information was compromised”.
The Syrian Electronic Army (SEA), which says it supports President Bashar al-Assad, has been behind recent hack attacks on the New York Times and Twitter.
The SEA has also targeted various other media companies, including the BBC, CNN and the Guardian.