Swiss authorities on Thursday warned about unauthorised and potentially violent protests targeting this year's World Economic Forum in Davos and its star attraction, US President Donald Trump.

US President Donald Trump will attend the World Economic Forum in Davos later this month, opening up a distinct possibility of a meeting with Prime Minister Narendra Modi.

Prime Minister Narendra Modi will travel to Switzerland on January 22 on a two-day visit during which he will deliver the keynote address at the plenary session of the World Economic Forum (WEF) in Davos.