The ban is in line with UN Security Council sanctions imposed in November in response to North Korea's fifth nuclear test two months earlier, the Commerce Ministry said in an online statement yesterday.
China had already banned coal imports from North Korea in April last year, but those restrictions allowed some imports for civilian use.
China is North Korea's largest source of trade and aid and Sunday's suspension will deprive Pyongyang of an important source of foreign currency.
However, it has grown increasingly frustrated with North Korea's defiance of UN demands that it end missile tests and development of nuclear weapons. North Korea launched its latest ballistic missile test a week ago.
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