The UK government will proscribe Palestine Action following the break-in and vandalism of RAF Brize Norton base in Oxfordshire on Friday morning, the BBC reported.
The UK Home Secretary Yvette Cooper announced she was preparing a written statement to present to parliament, which, if it passes, will lead to the organization being proscribed, essentially declaring it a terrorist organization.
If the group is proscribed, it would make it illegal to be a member of the group, provide material support to the group, or voice public support for the group.
The incident on Friday morning saw two activists break into the RAF base and spray red paint onto the engines of two Voyager aircraft present at the base. They are also accused of further damaging them with crowbars.
"Despite publicly condemning the Israeli government, Britain continues to send military cargo, fly spy planes over Gaza, and refuel US/Israeli fighter jets," the group said in a statement claiming responsibility for the action.
Counterterrorism police, as well as regional police and Defence Ministry officials, will be investigating the incident.
Palestine Action responded to reports of the impending proscription, saying, "In response, the political establishment rushes to call us 'terrorists', whilst they enact the worst crimes against humanity. No amount of smears or intimidation tactics will waver our solidarity with Palestine. We will break every link in the genocidal supply chain."
The UK Defence Ministry later updated that they did not expect the vandalism to interfere with operations.
Palestine Action's previous actions
This is the latest in a series of "actions" taken by Palestine Action in just the past year.
In April, several Palestine Action activists were charged with conspiracy to damage property after breaking into an Elbit factory in Bristol with a makeshift wrecking ball and throwing red paint on the walls.
In March, activists vandalized President Donald Trump's golf course in Scotland, throwing red paint all over the property and graffitiing "Free Gaza."
In February, activists threw red paint over the BBC headquarters in London as well as smashing glass doors, protesting "the BBC's [pro-Israel] systematic bias manufactures consent for the genocide."