Lufthansa says some 100,000 airline passengers won't be able to travel Wednesday because of an ongoing strike by flight attendants.

The German carrier said it has canceled 931 flights even as Lufthansa and the UFO flight attendants union sought mediation in their dispute.

The union wants to secure transition payments for its 19,000 members if they retire early, among other demands as part of its contract dispute with Lufthansa, which is trying to cut costs.

The airline said more than 2,000 flights across the group would operate as planned, including some code-sharing flights operated by its CityLine and Air Dolomiti brands and flights of subsidiaries such as Swiss, Austrian Airlines and Germanwings.

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Lufthansa strike information: http://bit.ly/1MTyWha