++ G20 underway in Hamburg amid violent protests - live updates ++

The G20 summit is underway in Hamburg amid a citywide shutdown and widespread protests. Chancellor Angela Merkel urged leaders to show unity on climate change, trade and migration. Follow DW's live updates here.

- The two-day Group of 20 summit of the world's major economic powers is taking place in the northern German port city.

- An estimated 100,000 protesters are taking part in demonstrations against the G20, some of which have turned violent.

- German Chancellor Angela Merkel, who is hosting the summit, opened the meeting by reminding delegates that they are responsible for millions of people around the world and that all parties must compromise in order to find solutions to global problems.

- US President Donald Trump and Russian President Vladimir Putin have met for the first time face-to-face on the sidelines of the summit. Trump said he had high hopes for the talks.

German Chancellor Angela Merkel has addressed world leaders at an official welcome in Hamburg. She said millions of people had put their hopes in the G20 to help solve the world's problems, adding that progress could only be made "if we are ready to - More, dw

++ G20 underway in Hamburg amid violent protests - live