A freight lorry crashed with a bus on a road near the South Korean capital Seoul on Thursday, causing a fire that killed at least five people and injured 37 others, officials said.
It was not known what caused the crash and fire or what cargo the lorry was carrying.
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The National Fire Agency said the three of the injured were in a serious condition while 34 others were lightly injured.
Officials said the crash happened inside a noise-barrier tunnel on the road.
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TV footage showed thick black plumes of smoke billowing from the tunnel, but fire officials said later they have almost put out the blaze.