• A senior North Korean diplomat left for Finland on Sunday for talks with former U.S. and South Korean officials, amid a series of diplomatic encounters ahead of a possible U.S.-North Korean summit, according to reports.

• North Korean and Swedish foreign ministers ended three days of talks on Saturday on security on the Korean peninsula in preparation for the meeting.

• South Korea said on Friday it was seeking high-level talks this month with North Korea to prepare for a summit and that South Korean President Moon Jae-in may meet Trump before that.

• In a telephone call, Moon and Trump both voiced "cautious optimism" about efforts to resolve the crisis over North Korea's nuclear weapons.

A senior North Korea diplomat left for Finland on Sunday for talks with former U.S.
and South Korea officials, Yonhap News Agency reported, amid a series of diplomatic encounters ahead of a possible U.S.-North Korean summit.

Choe Kang Il, a deputy director general for North American affairs at North Korea's foreign ministry, plans to attend the "track 1.5 talks", according to Yonhap, reflecting planned contact between former U.S. officials and current North Korean ones in a broader bid to end the standoff over North Korea's weapons programmes.

If confirmed, the talks in Finland will add to a flurry of diplomatic activity in face of the proposed North Korean summits with South Korea and the United States, respectively, in April and May.

Arriving at a Beijing airport en route to Finland, Choe declined comment.

North Korea is pursuing its nuclear and missile programs in defiance of U.N. Security Council sanctions and has made no secret of its plans to develop a missile capable of hitting the U.S. mainland.

It defends the programmes as a necessary deterrent against perceived plans by the United States, which stations 28,500 troops in South Korea, a legacy of the Korean war, for invasion.

The United States denies such plans. Tensions have eased in recent weeks, coinciding with North Korea's participation in the Winter Olympics held in the South last month.

North Korean and Sweden foreign ministers ended three days of talks on Saturday on security on the Korean peninsula in preparation of the meeting between U.S. President Donald Trump and Kim Jong Un .

South Korea said on Friday it was seeking high-level talks this month with North Korea to prepare for a summit and that South Korean President Moon Jae-in may meet Trump before the
U.S. president's planned meeting with the North Korean leader.

In a telephone call, Moon and Trump both voiced "cautious optimism" about efforts to resolve the crisis over North Korea's nuclear weapons.