President Donald Trump promised to ‘fix the mess’ surrounding North Korean dictator Kim Jong-un. The leaders of both countries have suggested using military action in recent weeks as tensions continue to grow.

North Korea started “aggressively” jamming the BBC’s new Korean language service on the same day it began, according to a report.

The service began broadcasting Tuesday to provide “news, sport, business and culture” to audiences “in the Korean peninsula and Korean speakers around the world” online and on radio, the British broadcaster said when announcing the launch.

“A key focus of the service is North Korea, where government censorship restricts access to independent news,” it added.

Listening to foreign radio stations is illegal in North Korea. The BBC’s shortwave channels were “aggressively targeted” by radio jamming on the first evening of broadcasts, according to 38 North, a website run by the U.S.-Korea Institute at Johns Hopkins University in Baltimore, Md.

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It said during radio jamming, a loud noise is transmitted over stations so that listeners can’t hear the content. South Korean officials have previously said that North Korea used radio waves to jam GPS systems, affecting planes and ships.

The BBC broadcasts are carried on shortwave frequencies from Taiwan and Uzbekistan, and on medium wave from Mongolia, 38 North reported. It said it wasn’t possible to determine if the medium wave frequency was…