This combo photo created on Nov 12, 2018 shows the Democratic People's Republic of Korea (DPRK)'s leader Kim Jong-un (left) and US President Donald Trump. (PHOTOS / MANDEL NGAN AND KOREA SUMMIT PRESS POOL / AFP)

WASHINGTON — The United States is seeking to achieve "a set of concrete deliverables" through working-level negotiations with Pyongyang ahead of the scheduled leaders' summit, said US envoy to the Democratic People's Republic of Korea (DPRK) on Thursday.

We expect to hold working-level negotiations with our North Korean counterparts in advance of the summit, with the intention of achieving a set of concrete deliverables ... a roadmap of negotiations and declarations going forward, and a shared understanding of the desired outcomes of our joint efforts.

Stephen Biegun, US special representative for the DPRK

"We expect to hold working-level negotiations with our North Korean counterparts in advance of the summit, with the intention of achieving a set of concrete deliverables ... a roadmap of negotiations and declarations going forward, and a shared understanding of the desired outcomes of our joint efforts," Stephen Biegun, the US special representative for the DPRK, said at an event at the Stanford University in California.

The DPRK is also referred to as North Korea.

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Also on Thursday, US President Donald Trump said that the date and location of his second meeting with top leader of the DPRK Kim Jong-un have been decided and will be announced next week.

"We'll be announcing the location and ... the exact date it will be, it'll be end of February," Trump told reporters at the White House. 

The meeting between Trump and Kim, if held as scheduled, will be the two leaders' second face-to-face encounter following their meeting in Singapore last June. Both sides have said they look forward to such a meeting. 

US Secretary of State Mike Pompeo said Wednesday that the second meeting would take place "someplace in Asia", without revealing further details. 

READ MORE: Trump says venue for 2nd DPRK-US summit picked

"We have communicated to our North Korean counterparts that we are prepared to pursue, simultaneously and in parallel, all of the commitments our two leaders made in their joint statement at Singapore last summer," said Biegun.

The US envoy also said Washington demands "a complete understanding of the full extent of the North Korean weapons of mass destruction missile programs" and disarmament experts' inspection into the nuclear facilities in the DPRK before "the process of denuclearization can be final."

Biegun will travel to Seoul on Sunday for a meeting with his counterpart from the Republic of Korea, Lee Do-hoon, said the US State Department on Thursday.

He will also have follow-up meetings with his DPRK counterpart to "discuss next steps to advance" the goal of denuclearization, the department said in a statement.

The US-DPRK relations improved last year. However, differences between the two sides remain over key issues including the scale of denuclearization, US sanctions and whether to issue a war-ending declaration.