Tens of thousands of people across several cities in Europe and Asia took to the streets to express their solidarity with the Black Lives Matter movement in the US.
Large protests were held in London despite government advice to avoid gatherings due to the risk of coronavirus.
The largely peaceful protests saw people holding placards reading "Black Lives Matter" outside the parliament.
Meanwhile, in the German city of Hamburg, police used pepper spray to disperse large crowds gathered in honour of George Floyd.
Protestors in Paris were also seen ignoring government order to ban demonstrations and gathering at the Place de la Concorde, close to the Embassy.
Protests were also held in Warsaw, Berlin, Brisbane, Sydney, Tokyo, Seoul and Bangkok.
In the US, protestors gathered across several cities for the 12th straight day to demand an end to police brutality and racism.
Britain is working with allies on a range of options to support commercial shipping through the Strait of Hormuz in the face of Iranian threats, Prime Minister Keir Starmer's spokesperson said on Tuesday as the U.S.-Israeli war with Iran roils oil prices.
Australia on Tuesday granted humanitarian visas to five Iranian women soccer players after they sought asylum, fearing persecution on their return home for their refusal to sing the national anthem at an Asia Cup match.
The humanitarian crisis in Lebanon has deepened amid the wider Middle East war, with 84 children killed and more than 667,000 people displaced, two UN agencies said on Tuesday.
Iran is fighting back but is not tougher than the U.S. military expected before the war, the top U.S. general told reporters on Tuesday, as the Pentagon promised its most intense day of strikes in the 10-day-old conflict.