Tens of thousands of peaceful protesters took to the streets to demonstrate against the G20 summit in Hamburg, hours after masked rioters clashed with police, burned cars and looted businesses.

Anti-globalisation activists have rioted for a second night as Hamburg hosts G20 leaders, setting up street barricades, looting supermarkets and attacking police.

Protesters have rioted for a second night as Hamburg hosts the G20 summit, setting up street barricades, looting supermarkets and attacking police with slingshots and petrol bombs.