According to the German news agency DPAaround 50 people, complained about breathing
problems and burning eyes.
Some people were taken to hospital, while those
who were evacuated had to wait outside in
freezing conditions before being let back inside
a short time later.
Authorities have been trying to work out what
the hazardous substance is after the alert was
raised in a security check area.
Hamburg Airport evacuated afterunknown toxin spreads