Donald Trump flips after summit, says North Korea still 'extraordinary threat'

US President Donald Trump cited an "unusual and extraordinary threat" to American national security as he maintained long-standing economic restrictions on North Korea, including the freezing of any assets in Washington, a media report said.

An official declaration, contained in a notice to Congress, came on Friday despite Trump's assertion this month that his June 12 historic summit with North Korean leader Kim Jong-un ended Pyongyang's nuclear weapons threat, reports The Washington Post.

Harsh economic restrictions will continue for one year under the declaration Trump signed on Friday.

The paperwork keeps in place restrictions first imposed a decade ago by President George W. Bush.

The ban on the transfer of any American assets by North Korea's leaders or its ruling party has been extended or expanded several times by former President Barack Obama and Trump himself in response to North Korean missile tests and other actions.