President Zelensky has urged countries to hit Russia with more sanctions in response to "a new wave of terror" after Monday's attacks on Ukraine.
China's ruling Communist Party is expected to hand a third five-year term to Xi Jinping, arguably the most powerful Chinese leader since Mao Zedong in the 1970s.
Russia has been widely condemned after bombarding cities across Ukraine, including launching missile strikes on the centre of Kyiv for the first time.
A large fire on the only crossing between the occupied Crimean peninsula and Russia was caused by a lorry explosion, Russian officials say.
Russia's President Vladimir Putin has signed the final papers to annex four regions of Ukraine - even as his military suffered further setbacks.
Gunmen have killed the mayor of a small town in south-western Mexico, and at least 17 others, officials have confirmed.
Ukrainian forces have liberated a key village in the southern region of Kherson, hastening another Russian military retreat.
Young children are dying in growing numbers in Somalia amid the worst drought to hit the country in 40 years. Government officials say that an even greater catastrophe could sweep the country within days or weeks unless more help arrives.
North Korea has fired a suspected missile over Japan, in what appears to be a deliberate escalation to get the attention of Tokyo and Washington.
Brazil's election is going into a second round in which left-winger Luiz Inácio Lula da Silva will face far-right incumbent Jair Bolsonaro.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.