Photos: Police, protesters clash in Germany upon Donald Trump's arrival for the G20 summit

German riot police are currently clashing with protesters in Hamburg, Germany as world leaders including President Trump arrive the country ahead of Friday's G20 summit.  

Police used water cannon as protesters threw smoke bombs, while officers clashed with demonstrators at the anti-capitalist Welcome to Hell protest. 

The demonstration is taking place approximately two miles from where the G20 summit is taking place.

Already, 20,000 police officers had been activated to keep the demonstrations under control amid high tensions.