Passengers at Argentina's main airport have damaged ticket counters and thrown objects at staff after an airline cancelled flights for a second day.
Several thousand passengers were stranded overnight at the airport
TV pictures showed broken glass in the terminal of the national carrier, Aerolineas Argentinas, at Ezeiza International Airport in Buenos Aires.
The protests were against delays caused by a baggage handlers' strike and a walk-out by ticket counter workers.
Witnesses said the stoppage began after a passenger abused an airline employee.
The passenger was said to have stormed into the offices of Aerolineas Argentinas on the second floor of the terminal and demanded the employee help resolve the situation.
The protests came after several thousand passengers were stranded overnight at the airport after the airline cancelled all its international flights on Thursday.
"There's no one from the company, no one is showing their face or telling us when we're going to fly. We're stranded with children and the elderly," a woman whose flight to Venezuela was cancelled on Friday told local television.
The delays to international flights are expected to continue throughout the weekend.