NEW YORK (CBSNewYork/AP) — Some Twitter accounts for the New York Post and UPI, as well as the news agency’s website, were briefly hacked Friday.

Tweets with false economic and military news were posted and then deleted.

One tweet on United Press International’s feed said that the Pope said World War III had begun.

Another on the Post’s business section Twitter feed said that Bank of America’s chief executive officer was calling for calm after a Federal Reserve decision.

Another UPI tweet that read, “BREAKING: Chinese anti-ship missile fired at USS George Washington” was followed closely by a supposed update to the story: “US Joint Chief of staff: USS George Washington damaged, US navy now engaged in active combat against Chinese vessels in South China sea,” CBS News reported.

CBS News confirmed with a spokesman for the Chairman of the Joint Chiefs of Staff that no Chinese anti-ship missile was fired at the Navy’s George Washington aircraft carrier.

The hack is being investigated, said Jenny Tartikoff, a spokeswoman for the Post. The newspaper is owned by News Corp.

In a statement posted to its website, UPI, based in Washington, said its Twitter account and website were hacked. Six fake headlines were posted to its Twitter account, and a “breaking news” banner with a fake story about the Federal Reserve was posted to its homepage until UPI’s technology support team shut down access.

This was the latest hack of a high-profile social media account. The Twitter and YouTube accounts of the U.S. military’s Central Command were compromised earlier this week by hackers claiming to support the Islamic State militant group, and Crayola apologized for a hack of its Facebook page that filled it with sex jokes and other off-color content.

The group claiming to represent the Cyber Caliphate – a part of ISIS – also attacked the Twitter feeds of the Albuquerque Journal, and Salisbury, Maryland news station and CBS affiliate WBOC-TV.

During a 2013 hack, Burger King’s Twitter feed posted obscenities and put up McDonald’s logo as its profile picture.

More dangerous intrusions of companies and organizations are also on the rise. Just since fall 2013, hackers at Sony Pictures Entertainment, Target, Home Depot and JPMorgan Chase compromised those companies’ computer networks and gained access to confidential information about customers or employees. The hacks have exposed the lack of uniform practices for dealing with breaches.

The White House is pushing for new cybersecurity legislation that increases the sharing of information between U.S. agencies and the private sector and protects businesses from lawsuits for revealing cyberthreats.

(TM and © Copyright 2015 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2015 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

Watch & Listen LIVE