A pair of Latvian nationals were arrested early on Thursday after they were discovered inside the perimeter of RAF Molesworth, a Royal Air Force base in Cambridgeshire that houses United States and NATO intelligence facilities. Police and military investigators said the arrests follow the discovery of an abandoned vehicle near the base and indications that the perimeter fence had been breached. Counter Terrorism Policing London said it is leading inquiries into the incident. Officers from the Ministry of Defence Police and Cambridgeshire Constabulary initially responded after security patrols raised the alarm late on Wednesday night. The two men were taken to a Cambridgeshire police station where they remain in custody while detectives establish the circumstances of their presence on the site. H2: What authorities have said Police statements released by the agencies involved described the matter as a suspected trespass on a prohibited site and confirmed the involvement of specialist counterterrorism investigators because of the sensitive nature of the location. The Ministry of Defence Police assisted in first response and evidence gathering around the breach of the base perimeter. Local policing sources said the incident started when an abandoned vehicle was located near the edge of the base, prompting a security sweep. Formal charging decisions have not been announced. Investigators are reported to be examining how and why the men entered the base grounds and whether any criminal intent can be established. At the time of publication no evidence has been disclosed that suggests the incident was connected to other recent security events at British military sites. H2: Why RAF Molesworth matters RAF Molesworth is one of several UK bases that host United States and NATO personnel and intelligence activity. For decades the site has been used for allied signals and intelligence operations. That role makes any unauthorised access especially significant to defence and security planners because of the sensitive material and coalition personnel located there. The arrests come amid an elevated security environment for several British bases following separate incidents and alerts over the past week. Those events have included a high profile probe into an apparent plot linked to another US-using air base in England that led to the temporary removal of American bombers from that site. Officials have publicly warned that military installations are potential targets for so called hybrid attacks that may be designed to create disruption, gather intelligence or attempt sabotage. H2: Wider security context and government response Defence and counterterrorism officials have in recent days emphasised the need for greater vigilance around critical infrastructure and military locations. The Ministry of Defence said it was working closely with civilian police forces and counterterrorism agencies to secure sites and to investigate the breach at Molesworth. A brief statement from the Defence Secretary thanked local and military security teams for their prompt response, while stressing that inquiries remain ongoing. Senior policing sources told reporters that while the identity and nationality of those detained were confirmed, investigators were continuing to establish whether the men were resident in the United Kingdom and what their movements were prior to the arrest. Media reports said the two were Latvian nationals aged 36 and 32 who were living in the UK, but police have not released detailed personal information as enquiries continue. H2: What this means for allied operations Security breaches of allied facilities complicate routine cooperation and can prompt temporary operational changes. In one recent case, US forces moved aircraft away from a UK base while police investigated a separate suspected plot. While there is no public evidence linking the Molesworth case to that operation, the proximity in timing of several incidents has led to heightened scrutiny across defence networks. Officials in London and partner capitals routinely assess risks to shared facilities, and any incident that exposes a vulnerability is likely to trigger reviews of perimeter security, patrol protocols, and intelligence sharing between defence and law enforcement agencies. Those assessments can result in short term operational adjustments designed to reduce risk while forensic and criminal enquiries proceed. H2: Next steps in the investigation Counter Terrorism Policing London is leading the criminal investigation, supported by the Ministry of Defence Police and Cambridgeshire Constabulary. Detectives will focus on the nature of the alleged trespass, forensic evidence from the vehicle and any damage to fencing or other infrastructure, and whether there was malicious intent or a reconnaissance purpose to the incursion. Authorities have appealed for anyone with information about suspicious activity near RAF Molesworth on the night in question to come forward. Given the involvement of counterterrorism units, the probe will follow established lines of inquiry for incidents involving sensitive defence sites, balancing public information needs with operational security imperatives. H2: Why the public should follow developments The Molesworth arrests are a reminder of the security pressures faced by alliance facilities in the UK. While many details remain under investigation, the involvement of specialist counterterrorism teams underlines the seriousness with which authorities treat unauthorised access to military and intelligence sites. Ongoing reporting and formal police updates will be the primary sources for confirmed developments as the investigation continues. This article will be updated as police and defence authorities publish further findings and charging outcomes.