Pilots at German airline Lufthansa said Monday they will stage new walkouts on freight and long-haul passenger services on Tuesday in their long-running dispute with management over early retirement provisions.

The strike, the 13th in 18 months, will begin at 0600 GMT and last until 2200 GMT. It will only affect the Lufthansa parent company, not the other airlines in the group, the pilots' union Cockpit said in a statement.