Thousands of people in London's Trafalgar Square protested Israel's actions, while counter-protesters stationed themselves nearby to call out support for Israel.
Thousands also marched in Brussels, Belgium, and in Madrid, Spain. The rallies were a continuation of the protests that took place a day earlier in cities worldwide.
Saturday, several thousand demonstrators in Washington gathered in a park across the street from the White House to protest Israel's offensive against Gaza.
The protesters carried Palestinian flags and shouted slogans in support of the Palestinians in Gaza.
In France, tens of thousands of people took to the streets of the capital, Paris. Protests were also held in smaller cities around the country.
Some information for this report was provided by AFP and AP.
