New York Post and UPI Twitter accounts hacked
Hack comes days after President Obama proposed to strengthen cyber security laws
The New York Post and the United Press International (UPI)'s Twitter accounts have been hacked with fake tweets on economic and military news, according to online media.
In a post from the UPI's Twitter account, the Pope was quoted saying "World War III has begun" and in the New York Post's account said that hostilities had broken out between the United States and China.
UPI, which is based in Washington, confirmed in a statement that both its Twitter account and news website had been hacked.
Six fake headlines were posted on its Twitter account and a breaking news banner was added to a fake story about the Federal Reserve on its homepage, the statement added.
A tweet on the New York Post's account said the USS George Washington, an aircraft carrier, was "engaged in active combat" against Chinese warships in the South China Sea and the Post has said it is investigating the hack.
The hack comes four days after US military command was compromised and days after US President Barack Obama unveiled proposals to strengthen cyber security laws after a spate of attacks on high-profile US targets, including the Pentagon Twitter feed and Sony Pictures.
The Twitter account of the US military command was suspended last Monday following an attack by hackers claiming to support Islamic State.