HONG KONG (AP) — The Latest on Hong Kong protests (all times local):

10:30 a.m.

Hong Kong leader Carrie Lam has defended law enforcement actions after protesters prompted an airport shutdown with calls to investigate alleged police brutality.

Airlines early Tuesday were checking in passengers for flights, including those cancelled the previous day because thousands of pro-democracy demonstrators had packed into the airport’s main terminal.

Demonstrators have called for an independent inquiry into what they call the police’s abuse of power and negligence. Some protesters thrown bricks, eggs and flaming objects at police stations.

Lam told reporters that dialogue would only begin when the violence stopped. She reiterated her support for the police and said they have had to make on-the-spot decisions under difficult circumstances, using “the lowest level of force.”

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8 a.m.

One of the world’s busiest airports was struggling to reopen the morning after thousands of pro-democracy demonstrators crowded into Hong Kong’s main terminal and forced flight cancellations.

Passengers were checking in for flights Tuesday morning in a sign operations were returning to normal, although protesters have shown no sign of letting up on their campaign to force Chief Executive Carrie Lam’s administration to respond to their demands.

About 200 flights had been canceled.

Passengers unable to leave on Monday were among those crowding in the departure hall.