LONDON, United Kingdom (AFP) — Tens of thousands of pro-Palestinian protesters marched in European cities calling for an end to the war in Gaza, hours before President Donald Trump said the United States military had attacked three Iranian nuclear sites Sunday.

In London, Agence France-Presse journalists saw tens of thousands of protesters, who waved Palestinian flags as they marched through the British capital clad in keffiyeh scarves.

In Berlin, more than 10,000 people gathered in the center of the city in support of Gaza, according to police figures.

And in the Swiss capital Bern, march organizers estimated that 20,000 people rallied in front of the national parliament, urging the government to back a ceasefire.

Thousands also gathered outside a French trade fair near Paris attended by Israeli defense firms, calling for an end to war profiteering and Israel’s offensive in Gaza.

There have been monthly protests in the British capital since the start of the 20-month-long war between Israel and Hamas, which has ravaged Gaza.

This Saturday, protesters there carried signs including “Stop arming Israel” and “No war on Iran” as they marched in the sweltering heat.

“It’s important to remember that people are suffering in Gaza. I fear all the focus will be on Iran now,” said 34-year-old Harry Baker.