Five people are believed to still be trapped at a power station in the South Korean city of Ulsan after a large structure collapsed, according to the Yonhap News Agency.
Two people were quickly rescued and then two others were pulled from the rubble, a fire official said.
They told reporters that workers were in the process of taking down parts of the structure, a decommissioned heating facility, to prepare it for demolition in about 10 days when the accident occurred.
Footage from the scene showed a massive steel structure mangled and toppled over in the south-eastern city surrounded by similar structures.
South Korean Prime Minister Kim Min-seok instructed the interior ministry and the firefighting and police agencies to mobilise all available equipment and personnel to rescue those

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