protestors

Some of the protesters who had been occupying the airport's arrivals hall swarmed into the departures area on Monday, prompting authorities to cancel all flights and advise travellers to leave one of the world's busiest hubs.

The action came in response to a sharp increase in the level of force employed by Hong Kong's embattled police. 

Hours before the airport shutdown, two police officers elsewhere in the city had pinned a black-clad demonstrator to the concrete, one officer's knee pressing the young man's face into a pool of his own blood.

Protesters blocked roads and paralysed train services at peak times on a day of action across the city.

More than 200 flights were cancelled as the protests entered their ninth week.

Hong Kong's leader, Carrie Lam, has pledged to restore law and order, rejecting calls for her resignation.

Initially the demonstrations, which began on 9 June, focused on a controversial extradition law, which would have allowed the transfer of suspects to mainland China. However, the protests have now become a wider challenge to Beijing's authority.

OVD-Info said the number of the detentions it logged for Saturday's protest reached 1,373 by early Sunday. The group has monitored arrests since 2011.

Russian police violently dispersed thousands of people who thronged Moscow streets on Saturday to protest election authorities for disqualifying independent candidates from the September 8 election for the Moscow city council.

Several protesters reported broken limbs and head injuries. Police justified their response by saying the rally was not sanctioned by authorities.