Not known for mincing his words, Philippine President Rodrigo Duterte called North Korean dictator Kim Jong Un a “fool” and a “son of a bitch,” according to Reuters Wednesday. This bluster came just days ahead of a multinational meeting in Manilla to address, among other things, concerns over North Korean’s missile launches and their naked ambition to build a long-range nuclear weapon.

“This Kim Jong Un, a fool ... he is playing with dangerous toys, that fool,” said Duterte in a speech. “That chubby face that looks kind. That son of a bitch. If he commits a mistake, the Far East will become an arid land. It must be stopped, this nuclear war.”

READ: Exploited North Korean Workers Sent To Russia

Duterte also warned about the danger of dealing with North Korea.

“A limited confrontation and it blows up here, I will tell you, the fallout can deplete the soil, the resources and I don't know what will happen to us,” said Duterte.

Duterte is this year’s chairman of the Association of South East Asian Nations (ASEAN), a partnership of ten southeastern Asian countries and Monday, the Philippines will host a security forum of 27 countries that will include ASEAN countries and delegations from North Korea and the United States.

Duterte questioned Kim’s sanity in April and said the dictator wanted to “end the world.” Previously, Duterte also called former President Barack Obama a “son of a bitch” and told him to “go to hell.”

U.S. Secretary of State Rex Tillerson will attend the meeting in the Philippines and hopes to have a dialogue with North Korea. Missile tests by the authoritarian regime have increasingly frustrated U.S. politicians.

Last week North Korea test-launched its second intercontinental ballistic missile (ICBM). This missile is considered to be the longest-range missile the country has ever manufactured, and the second ICBM test in one month. The Union of Concerned Scientists believes that the missile could hit most major American cities.

President Donald Trump has tweeted often about North Korea and condemned both its missile launches and its leader.

“North Korea has just launched another missile. Does this guy have anything better to do with his life?” Trump tweeted about Kim after North Korea’s first missile first ever ICBM launch on the Fourth of July this year.

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Trump has increasingly called on China to take a greater role in stopping Kim’s nuclear options, but with a border that is 880 miles long and an increasingly belligerent and enigmatic Kim, it is unclear what Trump expects China to do. China stopped buying coal from North Korea earlier this year and the United Nation have levied even harsher sanctions against the nation on top of older sanctions.

North Korea has hundreds of artillery units and missiles aimed across its southern border at South Korea — an ally who the U.S. conducts military exercises with — making the already sensitive issue even more complex.