Ground staff begin warning strike at Lufthansa. Ground staff at the Frankfurt, Munich, Hamburg, Berlin, Düsseldorf, Cologne/Bonn and Stuttgart locations will follow.

The airline wants to fly 10 to 20 percent of its planned program of around 1,000 flights on Tuesday. During the first wave of warning strikes almost two weeks ago, around 900 flights were canceled and more than 100,000 passengers had to reschedule. Collective bargaining is scheduled to continue on Wednesday.