"We think that the maximum pressure campaign is working," Sanders said during a press conference on Wednesday.

Sanders said the US will not let up on the maximum pressure campaign against North Korea.

"But again, we’re not going to let up on that campaign until we see some of the words that they’ve made go into concrete action.  But they’re moving in the right direction," she said.

Meanwhile, in a major development, North Korea has announced that it will suspend  nuclear and missile tests in the country, media reports said.

The country has also decided to shut down a nuclear test site, reports said.

The announcement was made by North Korean leader Kim Jong-un.

"From April 21, North Korea will stop nuclear tests and launches of intercontinental ballistic missiles," the Korean Central News Agency said as quoted by South Korea's Yonhap News Agency.

"The North will shut down a nuclear test site in the country's northern side to prove the vow to suspend nuclear test," it added.
 

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