Seoul (Yonhap), April 21 -- U.S. President Donald Trump and South Korea President Moon Jae-in on Saturday welcomed North Korean leader Kim Jong-un's pledge to suspend nuclear and missile tests and shut down its nuclear test site.

"North Korea has agreed to suspend all Nuclear Tests and close up a major test site. This is very good news for North Korea and the World - big progress! Look forward to our Summit," Trump said on Twitter.

"North Korea's decision is meaningful progress for the denuclearization of the Korean Peninsula, which the world wishes for," the presidential office said in a statement.

"It will create a very positive environment for the success of the upcoming inter-Korean and North-U.S. summits."

North Korea made the announcement ahead of its upcoming summits with South Korea and the U.S.

"From April 21, North Korea will stop nuclear tests and launches of intercontinental ballistic missiles," the Korean Central News Agency (KCNA) said earlier in the day, citing the outcome of a key meeting of the ruling party held Friday.

"The North will shut down a nuclear test site in the country's northern area to guarantee transparency in suspending nuclear tests," it added.