Lufthansa

Lufthansa and federal police declined to comment

Airline will put more planes out of service as it loses €500m a month

Demands support worth €9b in exchange for 25% stake in company

Stranded passengers were offered train tickets or given a seat on flights operated by other Lufthansa airlines

Brussels Airlines pilots go on strike demanding pay increases, better prospects as 80 per cent of flights are grounded

The pilots' strike is their 14th walkout since early 2014

Lufthansa has been battling a series of walkouts by both cabin crew and pilots over the last two years

Andreas Lubitz deliberately crashed flight A320 in March 2015, killing himself and the 149 others on board

Strike is expected to last a week, becoming longest in Lufthansa's history as both sides fail to agree on cost cuts

Of the cancelled flights, 23 were inter-continental services, Lufthansa said in a statement

At least 140,000 passengers were grounded and 1,000 flights were cancelled Wednesday

Pilots are striking over retirement benefits, pay and Lufthansa's plans to expand low-cost operations

Wednesday's strikes will also see flights of low-cost carrier Germanwings cancelled

Polish Air Navigation Services Agency says drone came within 330 feet during plane's flight from Munich to Warsaw