Historic summit: US President Donald Trump and North Korea’s leader Kim Jong-un at their historic US-North Korea summit, in Singapore on June 12, 2018. Image Credit: AP

Washington: US President Donald Trump said Sunday negotiations are under way on the location of the next summit with North Korean leader Kim Jong Un.

Trump, who held an historic summit with Kim in Singapore in June, said earlier in the week he had received a "great letter" from the North Korean leader but declined to reveal its contents.

"We are negotiating a location," he told reporters before boarding a helicopter for the presidential retreat at Camp David, Maryland, where he said he would be discussing a trade deal with China.

The letter from Kim came after he warned in a New Year's speech that Pyongyang may change its approach to nuclear talks if Washington persists with sanctions.

Trump insisted on Sunday, however, "With North Korea, we have a very good dialogue".