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LONDON, April 29 (Reuters) - Chilean miner Antofagasta cut its annual copper production forecast on Wednesday as it posted a fall in first-quarter copper output hit by protests at one of its mines and heavy rains in the Atacama desert.
The London-listed miner, which like others in the copper sector faces falling ore grades and weak copper prices, produced 146,400 tonnes of copper in the quarter, down 13.6 percent from a year earlier.
The mining company said production for the year will be some 15,000 tonnes lower that its previous forecast of 710,000 tonnes.
Reporting by Silvia Antonioli; editing by Jason Neely