German airline Lufthansa says it will cut 3,500 jobs worldwide, though its Swiss subsidiary will be unaffected.

Lufthansa said the cuts will mainly hit the administrative operation, part of a plan to raise earnings by 1.5 billion euros by 2015.

Swiss International Airlines will be responsible for 100 million euros of this improvement, said spokeswoman Susanne Mühlemann.

Swiss booked a loss of 4 million francs in the first quarter of this year, citing industry volatility and a difficult market.

Parent Lufthansa saw an operating loss of 381 million euros in the quarter.