A summit between US President Donald Trump and the North Korean leader Kim Jong-un has ended with no agreement, - BBC has reported citing the White House.

"No agreement was reached at this time, but their respective teams look forward to meeting in the future," spokeswoman Sarah Sanders said in a statement.

There had been some expectation the pair would announce an agreement on the thorny issue of nuclear disarmament.

Mr Kim had said his presence indicated his willingness to denuclearise.

"If I'm not willing to do that, I wouldn't be here right now," he told reporters earlier on Thursday. "That might be the best answer you've ever heard," Mr Trump replied.

Washington had previously said North Korea must unilaterally give up its nuclear weapons before there could be any sanctions relief, but that condition was known to be a sticking point for the North Koreans.