Hong Kong police fired beanbag rounds and used pepper spray in skirmishes with pro-democracy protesters Tuesday night, broadcaster RTHK said on Wednesday, as unrest that has gripped the Chinese-ruled city for months showed little sign of abating.

Hundreds of thousands of people have taken to the streets since mid-June in sometimes violent protests calling for greater democracy in the former British colony, posing a direct challenge to the central government in Beijing.

Riot police cleared demonstrators from outside the Mong Kok police station and in Prince Edward metro station, with one person taken out on a stretcher with an oxygen mask over his face, government-funded RTHK reported.