LONDON: Amnesty International has warned London’s Metropolitan Police to avoid arresting protesters who show support for the banned group Palestine Action, The Guardian reported.

It comes ahead of a major protest planned for this Saturday in London, and as the number of people prosecuted for showing support for the organization continues to grow.

Three people who were arrested in Westminster in July and charged with showing support for a proscribed organization are due to appear in court on Sept. 16. Since Palestine Action was proscribed on July 5, police across the UK have arrested 221 people for suspected offenses under the Terrorism Act.

The pro-Palestinian group was listed as a terrorist organization after breaking into an RAF airbase on June 20 and damaging aircraft.

The protest in support of the group this weekend will take place in Parliament Square, central London. The organizer, pressure group Defend Our Juries, has requested that protesters hold signs saying: “I oppose genocide, I support Palestine Action.”