Two more men have been arrested after two planes at an RAF base were vandalised in an action claimed by soon-to-be banned campaign group Palestine Action.

Counter Terrorism Policing South East said the men, aged 22 and 24 and both from London, were arrested on Saturday afternoon on suspicion of the commission, preparation or instigation of acts of terrorism, contrary to Section 41 of the Terrorism Act 2000.

On Thursday, police said a woman aged 29 of no fixed address and two men aged 36 and 24 from London had been taken into custody after the incident at RAF Brize Norton on June 20.

A 41-year-old woman of no fixed address was also arrested on suspicion of assisting an offender, they previously said.

Palestine Action previously posted footage online showing people inside the Oxfordshire base, with one person appearing to ride an electric scooter up to an Airbus Voyager air-to-air refuelling tanker, before spraying paint into its jet engine.