Protesters have plastered posters, flyers and even spray-painted graffiti all over the airport.
One makeshift sign reads: "Sorry for the inconvenience but we're fighting for survival!"
Another says: "Shame on the cops." The sign refers to the police officers who protesters are accusing of brutality, corruption, inaction, and use of excessive force.
All departing flights, and several incoming flights, have been canceled because of the airport shutdown.