Hong Kong's main public broadcaster, Radio Television Hong Kong (RTHK), dropped a 24-hour BBC World Service channel from its airwaves Monday, replacing it with state radio from China in what critics say is a sign of encroaching Chinese control in the former British colony.

Tensions between Hong Kong and Beijing's ruling Communist Party leaders have grown in recent years, particularly over the "Occupy" civil disobedience movement in 2014 when tens of thousands of protesters, demanding full democracy, blocked roads for 79 days.

Hong Kong returned from British to Chinese rule in 1997 with the promise of wide-ranging autonomy under a "one country, two systems" formula.