There are strong indications that Iran was involved in a suspected terrorism-related incident at RAF Fairford airbase in southwestern England, UK Prime Minister Andy Burnham has said.

Police arrested five men near the base on Sunday on suspicion of explosives offenses and preparing a terrorist attack. RAF Fairford hosts US bombers used in missions against Iran. All five suspects were released on bail the following day as officials remained tight-lipped about the nature of the case.

“There are strong indications that Iran played a part in what happened over the weekend at RAF Fairford,” Burnham told the BBC on Wednesday, marking the first time UK authorities have publicly linked the incident to a foreign actor.

He declined to provide further details, promising to “say more in due course.”

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