Noxious fumes, apparently from a cleaning solvent, escaped into part of Sydney's international airport today, and at least 50 people were treated, officials said.
Ambulance, police and fire crews were called to the departure terminal in response to reports of a "major gas leak," said Andrew Hall, a spokesman for the New South Wales state Ambulance Service.
Departing passengers and airport staff reported stinging eyes and difficulty breathing in a part of the terminal that was quickly sealed off. At least 10 people were taken to a hospital and 40 more treated at the scene, authorities said.
"Most have been treated with oxygen and saline in their eyes to ease the irritation," said Caroline Hancock, an ambulance spokeswoman.