A seventh suspect has been arrested over a break-in at RAF Brize Norton during which two military aircraft were damaged.
The 22-year-old man was detained on Friday in Bedford on suspicion of the commission, preparation or instigation of acts of terrorism.
The incident saw activists break into the Oxfordshire air base and spray paint on two RAF Voyager planes, causing £7million worth of damage.
Palestine Action, which has since been proscribed under terrorism legislation, said it was behind the incident.
Last month, four people were charged and remanded in custody over the break-in
