N. Korea silent on possible US talks: Tillerson

Secretary of State Rex Tillerson on Monday said the U.S. has "not heard anything directly back from North Korea" since President Donald Trump accepted Km Jong Un’s invitation to talks. 

At a news conference during a visit to Nigeria’s capital, Abuja, Tillerson said that the U.S. expects to hear directly from Pyongyang.

He described plans for the possible meeting as being in the "very early stages and said many steps need to occur before any talks takes place but did not elaborate what those steps would be.

South Korea's national security advisor Chung Eui-Yiong late last week told reporters at the White House that Trump agreed to meet Kim by May after Kim "expressed his eagerness to meet President Trump as soon as possible".

Tillerson also said the location for the meeting has not been determined but it is "very important that those conservations are held quietly".

Trump and Kim have a year-long history of acrimonious rhetoric, with Trump notably threatening the North Korean leader, whom he has called "little rocket man", with "fire and fury", and Kim retorting "a frightened dog barks louder" after Trump addressed the UN.

The U.S. fully expects the meeting to take place, the White House said shortly after Tillerson's remarks.

"The offer was made and we’ve accepted. North Korea made several promises and we hope they would stick to those promises, and if so, the meeting will go on as planned," spokeswoman Sarah Huckabee Sanders told reporters. 

Preparations for the meeting are ongoing, she added. 

The U.S. and North Korea lack formal diplomatic ties, and nearly three decades of sporadic talks have failed to de-nuclearize the Korean peninsula.

If the meeting does take place it would mark the first sit-down between a serving U.S. president and a North Korean leader.