An American national was arrested after being caught trying to swim across a river from South Korea into North Korea, apparently because he wanted to meet Kim Jong Un, officials in Seoul said Wednesday.

South Korean marines found the man lying on the banks of the Han River, which runs through Seoul but forms the border with North Korea along its western stretch, just before midnight local time Tuesday, a Defense Ministry spokesman said.

The man is in his early 30s and was being questioned by South Korean intelligence officials Wednesday, the spokesman said but declined to provide further details.

“I was trying to go to North Korea in order to meet with supreme leader Kim Jong-un,” the man told his interrogators, the South’s Yonhap News Agency reported, quoting a government source.

Such an escapade near the demilitarized zone between North and South Korea, which share the world’s most heavily fortified border, is highly dangerous. Soldiers on the southern side fatally shot a South Korean citizen last year after he tried to swim across the river to the North.

The incident comes as Pyongyang holds three Americans accused of committing “hostile acts,” an apparent bid by the North to use them as bargaining chips in dealings with the Obama administration.

North Korea on Sunday sentenced Matthew Miller, a California man who reportedly ripped up his tourist visa on arrival at the Pyongyang airport in April, to six years of hard labor.

Kenneth Bae, a Korean American missionary, is two years into a sentence of 15 years’ hard labor for “hostile acts to bring down the government.”

Jeffrey Fowle, a 56-year-old from Ohio, was arrested in May after leaving a Bible in a seamen’s club in the northeastern city of Chongjin and is awaiting trial.

Pyongyang has made it clear that it wants to cut a deal with the United States. It delivered the trio to visiting news organizations this month for highly orchestrated interviews, during which each of the men called on Washington to send an envoy to secure their release.

The State Department has offered to send Robert King, its point man on North Korean human rights, to Pyongyang, but nothing has come of it. North Korea apparently wants someone with a higher profile.

Other Americans detained in North Korea in recent years have been released after visits by former U.S. presidents Jimmy Carter and Bill Clinton.

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This is not the first time an American has tried to swim to North Korea.

Evan Hunziker swam naked across the Yalu River from China to North Korea on a drunken dare in 1996 when he was 26. He was arrested and accused of spying but was freed three months later when Bill Richardson, then a New Mexico congressman who had been dealing with North Korea, went to Pyongyang to secure his release.

Yoonjung Seo in Seoul contributed to this report.