Newsweek's Twitter account was reportedly hacked by a group claiming to be Islamic State sympathizers known as the Cyber Caliphate.

The group tweeted disturbing threats on Tuesday morning to President Barack Obama, the First Lady and their daughters in a message warning of a "Bloody Valentine's Day," The Hill reported. The hacked Twitter profile's header picture was also changed to display an image declaring "Je suIS ISIS," a pro-ISIS message that was reminiscent of those plastered on CENTCOM's social media accounts when they were hacked last month.

"Bloody Valentine's Day Michelle Obama! We're watching you, your girls and your husband!" the Cyber Caliphate tweeted from Newsweek's account.

At one point, the hackers also claimed they would be publishing confidential documents from the U.S. National Cybersecurity Center.

"In the name of Allah, the Most Gracious, the Most Merciful, under the flag of the Islamic State, CyberCaliphate continues its Cyber/Jihad. While the U.S. and its satellites are killing our brothers in Syria, Iraq and Afghanistan we are destroying your national cybersecurity system from the inside," the message read.

"With Allah's permission we continue CyberJihad inside Pentagon's computer networks. Today we publish confidential documents from the U.S. National Cybersecurity Center. The Islamic State is already here, CyberCaliphate got into your PC's. We know everything about you and your relatives and we're much closer than you can even imagine. You'll see no mercy infidels!"

A few hours later, Newsweek confirmed the hack and said it had regained control of the account. The tweets have since been taken down, according to CBS News.

"We can confirm that Newsweek's Twitter account was hacked this morning, and have since regained control of the account," Newsweek said in a statement. "We apologize to our readers for anything offensive that might have been sent from our account during that period, and are working to strengthen our newsroom security measures going forward."

In January, Cyber Caliphate had infiltrated the Twitter and YouTube accounts for the U.S. Central Command.

The group has also taken credit for hacking the Twitter accounts of Maryland television station WBOC-TV and The Albuquerque Journal, the New York Daily News reported.