Earlier, a local newspaper reported that US Director of National Intelligence Dan Coats arrived at a US airbase in Osan, south of Seoul, Tuesday night for a three-day stay. The government source confirmed his arrival but declined to elaborate further.
His detailed schedule in Seoul has yet to be confirmed but he is likely to meet his South Korean counterpart, National Intelligence Service Director Suh Hoon, and other senior officials.
The trip came after North Korea repaired its Dongchang-ri long-range rocket launch site that had been partially dismantled last year. That led to concern that the rebuilding could be a sign Pyongyang may be preparing a missile launch.
Last week, North Korean Vice Foreign Minister Choe Son-hui threatened that Pyongyang may stop nuclear talks and resume nuclear tests and missile launches, saying that it has no intention to give in to Washington's "gangster-like" demands.
While in Seoul, Coats is expected to share intelligence and assessment on North Korea and coordinate a joint approach in dealing with the communist nation's nuclear weapons program.
North Korean leader Kim Jong-un and US President Donald Trump met in Hanoi, Vietnam, in late February but failed to strike a deal as they differed on the scope of denuclearization steps from Pyongyang and reciprocal concessions, including sanctions relief, from Washington.
The US has since stepped up calls for strict enforcement of sanctions on North Korea until its complete denuclearization.
In January, Coats told Congress that he believes it is unlikely the North will completely abandon its nuclear weapons program because Pyongyang views the program as critical to regime survival. (Yonhap)