North Korea blew up the inter-Korean liaison office in the border town of Kaesong, said unification Ministry of South Korea.
According to Yonhap news Agency, Pyongyang threatened to blow up office for the distribution of propaganda leaflets by the defectors.
Witnesses reported multiple explosions and a powerful smoke, office building almost completely destroyed.
Earlier it was reported that the explosion occurred near the Kaesong industrial complex in the DPRK in the second half of the day.
Relations between the two Koreas worsened in the past two weeks, North Korea has threatened to send military units into the demilitarized zone on the border.
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