The arriving passengers were mistakenly allowed through the Schengen area, and were not subject to regular passport checks.
Many passengers reacted with fear to police and immigration officials cordoning off parts of the airport, and complained of not being informed of the reasons behind the action.
The blunder resulted in delays of around one hour to most international flights that were to depart at the time of the incident.
Lisbon Airport security seems to be run by a lot of lunatics.
Last night my flight was delayed by 2 hours and I along with over 100 passengers, including 8 month old children, had no access to water. Vending machine was broken and not fixed.
Security refused exit from holding gate. Head of secuirty was staring at Facebook feed on the job. Disgraceful and dangerous handling given the state of terrorism in the world.
By Philippa Baines from UK on 21 Aug 2017, 14:02