British police said the five men detained near the Fairford air base are UK nationals from London, and all of them were released on bail without immediate charge, according to The Guardian.

For the newspaper, the absence of an immediate charge suggests they are not deemed to pose a serious and violent threat. Iran has said that bases used by the US to attack it, including Fairford, were “legitimate targets”. According to The Guardian, the question of whether Iran had a hand in the alleged plot remains open.