Swiss police on Wednesday used water cannons, rubber bullets and tear gas to subdue demonstrators in Zurich who ignited fireworks and threw bottles as part of a protest targeting the annual World Economic Forum (WEF) conference in Davos.

US President Donald Trump said Wednesday his administration was preparing to add a "couple of countries" to the controversial list of states whose citizens are subject to travel bans or severe restrictions on entry to the United States.

Britain's Prince Charles said on Wednesday that global warming and climate change are the greatest threats humanity has faced, calling on business leaders in Davos to act now to create a sustainable economic future.