German Union Calls 1-Day Strike by Lufthansa Ground Staff

Lufthansa flight attendants silhouetted as they pose for a photograph on occasion of the company's annual press conference in Munich, Germany, on March 16, 2017. Matthias Schrader/AP Photo

BERLIN—A German union has called on Lufthansa ground staff to walk out on a one-day strike Wednesday in a dispute over pay.

The ver.di service workers’ union said Monday that the call applies to all Lufthansa locations in Germany. It comes amid negotiations on pay for about 20,000 employees of logistical, technical, and cargo subsidiaries of the airline.