March 13 (Reuters) - Chinese top copper smelters agreed in a meeting on Wednesday to cut production at some loss-making plants to cope with a raw material supply shortage, two sources close to the matter said.

The meeting comes as copper concentrate fees on the spot market dropped to their lowest in more than a decade, hurting smelters' profit. (Reporting by Beijing Newsroom and Mai Nguyen in Hanoi; Editing by Jacqueline Wong)