Burnham said U.K. and U.S. officials are carrying out a “complex and serious” investigation into how and why five men and three vans were near the perimeter of RAF Fairford, a base that has been used by American bombers striking Iran during this year's war.
Five British men in their 20s were arrested Sunday on suspicion of explosives offenses and planning an act of terror, before being released on bail a day later. Police say they found a quantity of an accelerant – gasoline – in the vans, but no explosives.
“There are strong indications that Iran played a part in what happened over the weekend at RAF Fairford, but of course it remains an ongoing, complex, and serious police investigation,” Burnham told the BBC in one of a series of interviews with British broadcasters. “And of course, we are working closely with our colleagues in the United States of America.”
Iran has denied involvement in the incident. It has previously said that it considers any base used to attack its territory a legitimate target.
The base 100 miles west of London has been used by American bombers during decades of conflicts in the Middle East, including this year’s war with Iran.
Top U.S. officials have criticized the decision to grant the suspects bail, with President Donald Trump saying “I wouldn’t have done that" and Secretary of State Marco Rubio saying a lot of people were “disturbed” by the move.
Burnham said authorities have the investigation under “the strongest grip and the closest control,” and British officials had been “talking to counterparts in the United States all week to explain what is happening here, how things are being done.”
“I have complete confidence in the way British security services are handling this,” he told the BBC.
Laurence Taylor, the head of British counterterror policing, said Tuesday that the suspects remain under investigation and the decision to grant bail was grounded in “experience and strategy.”
