More countries are joining the move to scale back diplomatic ties with North Korea in response to its sixth nuclear test, Sept. 3.
On Monday, Spain asked the North Korean ambassador in Madrid to leave the country by the end of September, the first European country to expel a North Korean diplomatic envoy.
The move follows similar steps by Mexico, Peru and Kuwait earlier this month. It also comes as the international community steps up its efforts to heighten sanctions against the nuclear-weapons seeking state.
The United Nations Security Council unanimously adopted Resolution 2375 last week, which put a cap on the country's crude oil imports and a ban on its textile exports.
The United States has called on other countries to cut diplomatic and trade ties with the North in a bid to further isolate the Kim Jong-un regime.
"Today, the North Korean ambassador was summoned and was told of the decision to consider him persona non grata, therefore he must stop working and leave the country before Sept. 30," the Spanish foreign ministry said in a statement, according to Reuters.
It earlier ordered the North Korean Embassy to reduce its staff, Aug. 31, two days after Pyongyang test-fired an intercontinental ballistic missile.
North Korea opened its embassy in Madrid in 2014 and Kim Hyok-chol, its first ambassador to Spain, has so far served there.
The U.S. welcomed the Spanish government's decision.
A State Department official told the Spanish wire service EFE on condition of anonymity that the U.S. "praises the Spanish government's decision to take this step to increase the pressure on the North Korean regime."
Kuwait ordered North Korean ambassador So Chang-sik and four other diplomats, Sept. 17, to leave within a month, halving the size of the North's diplomatic mission. It also decided to stop issuing visas to North Korean passport holders.
Mexico designated North Korean Ambassador Kim Hyong-gil as persona non grata Sept. 7, and asked him to leave within 72 hours. Peru took a similar step, Sept. 12, saying the decision was made in light of North Korea's "repeated and flagrant violation" of UNSC resolutions.
Some countries are scaling down their economic ties with Pyongyang, other than taking diplomatic measures.
The Philippines, one of the North's top three trade partners, announced Sept. 8 it would suspend trade relations to comply with UN resolutions. Thailand has also reportedly cut down on economic exchanges with the country.