Protesters marched in cities around the world on Saturday in support of Palestinians.

The demonstrations marked one year since the Gaza ceasefire went into effect, Al Jazeera reported. Crowds gathered in New York, London, Berlin, Athens and Dublin, among other places.

The Global Alliance for Palestine said there were at least 325 events, including 176 in Europe, Middle East Eye reported. Organizers estimated about 250,000 people joined the London march. Police did not give a crowd estimate.

In London, thousands gathered on the Embankment at midday and marched toward parliament, The Guardian reported. Many wore keffiyehs and carried Palestinian flags and signs reading "Free Palestine." Marchers held a two-minute silence for those killed in Gaza. London's Metropolitan Police said it made 20 arrests, including for criminal damage after people climbed onto the Battle of Britain memorial.

Protesters called on the British government to stop supplying weapons used by Israel.

Fox News reported that the global "day of action" was carefully planned. It said organizers shared messaging guides and plans for the protests in advance. Fox described some signs as "emotionally charged," including images of Israel's Prime Minister Benjamin Netanyahu with a noose in Malaysia.

Israel rejects accusations of genocide. It says its war in Gaza targeted Hamas after the group's Oct. 7, 2023, attack, which killed about 1,200 people in Israel.

Gaza health officials say more than 74,000 Palestinians have been killed since the war began. Aid groups say much of Gaza remains in ruins despite the ceasefire, and talks on its future are stalled.

What we know: Pro-Palestinian marches were held in cities worldwide on Saturday, organizers counted at least 325 events, and London police made 20 arrests.
What we don't: How many people took part in all.