Leaders from the Group of 20 major economies on Monday issued a joint statement highlighting the suffering caused by conflicts in Gaza and Ukraine, while calling for cooperation on climate change, poverty reduction and tax policy.

G20 leaders met in Rio de Janeiro on Monday for talks on climate change, ongoing wars in Ukraine, Gaza and Lebanon, and more, at a forum that highlighted differences between world powers but also delivered some successes.

With leaders from the world's biggest economies converging on Rio de Janeiro for a two-day G20 summit starting Monday, the usually relaxed seaside city is under a tight security blanket.