Questions about the report have also surfaced online, Yonhap said.

有关该报告书的问题也出现了网上，韩国联合通讯社说。

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Kim and Tong had pleaded guilty to the charges at their trial, Yonhap said.

金及童已承认其在审判的指控，韩国联合通讯社说。

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Yonhap, the South Korean news agency, citing unnamed intelligence sources, said that the plane appeared to be a Soviet-era military jet and that the pilot might have been trying to defect.

韩联社，韩国的新闻通讯社，则援引匿名的情报来源说，这架飞机看上去属于前苏联时期的军用喷气战斗机，其飞行员可能尝试叛逃。

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Yonhap said police had secured warrants for the arrest of two union leaders involved.

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The South Korean news agency Yonhap said that two warships equipped with Aegis defence systems would monitor the situation.

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The Yonhap news said it was expected to make contact with its ground station at 05:00 on Thursday, at which point its operators will be able to make the final judgement on whether the launch achieved its goals.

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