Four pro-Palestinian activists have been charged after breaking into a military air base in central England last month and damaging two planes in protest against Britain’s support for Israel, Reuters reports.

Counterterrorism police said the charges were for conspiracy to enter a prohibited place knowingly for a purpose prejudicial to the safety or interests of the UK, and conspiracy to commit criminal damage.

The four, aged between 22 and 35, remain in custody and are due to appear in a London court today. Police said they will present evidence to the court linking the offences to terrorism.

The campaign group Palestine Action has said it was behind the incident on June 20, when the air base in Oxfordshire in central England was broken into and red paint was sprayed over two planes used for refuelling and transport.

The police statement said those charged had caused £7 million ($9.55m) worth of damage to the two aircraft at the Brize Norton Royal Air Force base.