Passengers at Athens International Airport (AIA) will not be allowed as of Monday to carry in their hand luggage more than one liter of liquid in a European Union move aimed at improving flight safety. The AIA said yesterday that passengers will only be permitted to carry on board a maximum of 10 liquid containers, each with a 100 milligram capacity. Travelers may still include in their hand luggage liquids such as alcoholic drinks purchased duty-free, as they will be placed in special tamper-proof plastic bags by the retailer. Passengers must not open the bag until they have arrived at their destination. AIA said that security staff will increase by about 30 percent to help inform passengers of the new measure and help with any delays at the check-in counter. Posters, brochures and overhead announcements will be used at the airport to help inform passengers of the safety measure – applicable on both domestic and international flights. The changes do not affect checked-in baggage items.