UK Counterterrorism Police have taken over the case of two Latvian men detained near RAF Molesworth.
The Metropolitan Police first held the pair on suspicion of trespassing on a prohibited site. Both were then rearrested under the National Security Act 2023, on suspicion of entering a prohibited place for a purpose prejudicial to the safety or interests of the UK.
Authorities say no apparent link has been found to previous threats against British bases.