UK police arrest dual UK-Iranian man in Fairford air base investigation

But counter-terrorism police said they were considering whether a foreign state had ​been involved in the incident and Prime Minister Andy Burnham said on Wednesday it might have ​had an Iranian link. Iran has said accusations it was involved were baseless and on Thursday summoned the British ambassador in Tehran over the issue.

In the latest development, police said they had arrested the 25-year-old dual national in London. "The ​investigation into circumstances surrounding events in Gloucestershire is hugely complex, and our specialist teams are ​interrogating multiple lines of enquiry," Britain's Senior National Coordinator for Counter Terrorism Policing, Vicki Evans, said in a ‌statement.

"As ⁠we’ve made clear, we’re looking at all possible angles – including possible foreign state involvement. "Police launched a massive operation in the early hours of Sunday "due to a range of information" including an alert from a local farmer who became suspicious of the men who she had seen near ​the base in three ​vans.

However, the Times newspaper ⁠reported that one of the men had also called emergency services shortly before being arrested. Detectives have confirmed that although petrol was found in ​the vans used by the men, no improvised explosive device was present.

Burnham ​said Britain ⁠was working closely with the US, whose bombers have in recent months used Fairford to launch missions against Iran, although US President Donald Trump said he would not have released the men, who ⁠police ​said were only freed under stringent conditions.

Trump previously said ​those involved had planned "big damage" while US Secretary of State Marco Rubio also pointed to the "hands of a foreign actor" ​in the incident.