SEOUL, March 19 (Reuters) - North Korean security officials have detained two Korean American journalists who were filming across the Tumen River from the Chinese side of the border, South Korean television reported on Thursday.

The YTN channel quoted a South Korean government official as saying North Korean guards crossed the border into Chinese territory to arrest the two on Tuesday after they ignored warnings to stop filming.

It said the two worked for an online news company based in California but gave no other details. South Korea's foreign ministry could not immediately confirm the report. (Reporting by Jack Kim, editing by Jonathan Thatcher)

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