HONG KONG — Protesters began issuing apologies on Wednesday for causing disruptions at the Hong Kong airport, as fallout from scenes of violence and chaos there, along with a court injunction, threatened to eliminate the transportation hub as one of their most effective venues for demonstrations.

Protests led the airport, one of the world’s busiest, to suspend check-ins for two days in a row this week, causing hundreds of flight cancellations and delivering a blow to a symbol of Hong Kong’s efficiency and economic prominence.

The airport said Wednesday that at 2 p.m. it would begin limiting terminal access to ticketed passengers and airport workers.