On Thursday, the leader of Greenpeace's United Kingdom branch and five other activists were reportedly arrested. The arrests followed an action where they poured hundreds of liters of "blood-red dye" into a pond at the U.S. embassy in London. The protest was against the ongoing war in Gaza.

Greenpeace stated that the demonstration aimed to draw attention to the "death and devastation caused in Gaza" which they attribute to the United States' continued sale of weapons to Israel. Twelve activists were involved in the action. They used containers labeled "Stop Arming Israel" to pour the non-toxic, biodegradable dye into the pond. The containers were transported to the embassy on bicycles with trailers disguised as delivery bikes.

Will McCallum, the co-executive director of Greenpeace UK, was among the six individuals taken into custody. A Metropolitan Police spokesperson confirmed the arrests, stating that officers became aware of the protest at 07:30hrs on Thursday, April 10th. The spokesperson added that the group fled the scene, but officers conducted a search and made the arrests on suspicion of criminal damage and conspiracy to cause criminal damage. The spokesperson also noted that the pond is accessible via a public footpath and that there was no breach of the embassy's secure perimeter.

The U.S. State Department did not immediately respond to requests for comment. Footage released by Greenpeace UK showed the activists dumping the dye into the pond. Areeba Hamid, co-executive director at Greenpeace UK, stated that the action was taken to highlight the impact of U.S. weapons on the war in Gaza. She also called for a halt to the arming of Israel by both the U.S. and the U.K. governments.