By Robert Wall And Rory Gallivan 

LONDON--British engine maker Rolls-Royce Holdings PLC deepened restructuring plans disclosing plans to cut 10% of jobs at its struggling marine business amid a sustained slump in the oil and gas market.

The London-based company said it will eliminate 600 jobs in its marine business by the end of the year as it reduces costs in response to tough market conditions. The reductions will be around the world but about half will be in Norway, Rolls-Royce said on Monday.

The company last year disclosed 2,600 job cuts in its critical aerospace activities to boost profitability.

The cuts in its marine activities come after Rolls-Royce last year suffered repeated profit warnings in part because of weakening demand from oil and gas companies as they trimmed spending plans owing to low crude prices. Almost 60% of last year's GBP1.7 billion ($2.66 billion) in underlying sales in the marine business were linked to offshore oil and gas markets.

"It is never an easy decision to propose reductions in our workforce, but it is a sign of the challenging market in which we operate," said Mikael Makinen, president of Rolls-Royce's marine division.

Rolls-Royce earlier this month warned that sales from lower oil prices started slower than in the year prior period.

The job cuts come even ahead of the change in leadership at Rolls-Royce where board member Warren East will replace retiring Chief Executive John Rishton effective on July 2.

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