German firefighters on Sunday Feb..12 evacuated hundreds of passengers at Hamburg Airport after about 50 people were injured by an unknown hazardous material that likely spread through the airport's air conditioning system.
All flights were halted for several hours due to the evacuation, but air traffic started running again around 2 p.m., airport spokeswoman said.
More than 68 people — both passengers and staff — had complained about breathing problems, burning eyes and nausea.
Those who were evacuated from the airport but not injured had to wait outside the terminals in freezing temperatures.
Firefighters designated special areas outside the airport building where physicians were examining those injured by the unknown substance.