US Special Representative for the DPRK Stephen Biegun. [Photo/Agencies]

WASHINGTON - US special envoy for the Democratic People's Republic of Korea (DPRK) Stephen Biegun will visit the Republic of Korea and Japan in the coming week amid escalating tensions between the United States and the DPRK, said the US State Department on Friday.

Biegun will travel to Seoul and Tokyo on Dec 15-19 to meet his counterparts there and continue "close allied coordination" on the DPRK, according to a statement released by the department.

The special envoy's visit comes as a year-end deadline set by Pyongyang for Washington to change its policies looms.

The Korean Central News Agency also reported Sunday that the DPRK carried out "a very important test" at the Sohae Satellite Launching Ground on Dec 7.

In response, US President Donald Trump said the DPRK side risks losing "everything" if it acts "in a hostile way".

Denuclearization negotiations between Washington and Pyongyang have stalled since the second summit between the DPRK's top leader Kim Jong-un and Trump in Hanoi in February ended without a deal. The two leaders first met in Singapore in June 2018.