HAMBURG (Reuters) – German police used water cannons to disperse around 500 anti-capitalist protesters overnight in the port city of Hamburg where Chancellor Angela Merkel will host leaders of the G-20 leading economies in a two-day summit starting on Friday.

Tens of thousands of protesters are expected to march in the city this week against globalization and what they say is corporate greed and a failure to tackle climate change. German authorities believe around 8,000 demonstrators were prepared to use violence, the interior minister said on Tuesday. Some 20,000 police officers will be deployed.

Source: German police disperse G-20 protest with water cannon before summit