British police have re-arrested two men for the planned attack on the RAF Fairford air base where American planes were stored last month.

A U.S. Air Force B-52H Stratofortress deployed from Barksdale Air Force Base, La., lands after supporting Global Thunder 20 at RAF Fairford, England, in 2019. British counterterrorism police re-arrested two men in the attempted plot on the Fairford base in September. File Photo by Senior Airman Stuart Bright/USAF/UPI UPI

Oct. 20 (UPI) -- British police re-arrested two men for the planned attack on the RAF Fairford base where American planes were stored last month, officials said Tuesday.

The two men were a British man, 24, and a British-Iranian man, 25. They were arrested on suspicion of helping Iran's foreign intelligence service, police said in a statement.

This time the arrests were for Section 3 of the National Security Act, which says that it's a crime to engage in conduct "likely to materially assist a foreign intelligence service."

"So far seven men have been arrested in connection with our investigation," Laurence Taylor, senior counterterrorism police officer, said in a statement. "As a result of the ongoing efforts of our officers, earlier today two of those men were re-arrested for offenses relating to Section 3 of the National Security Act -- assisting a foreign intelligence service."

"Our investigators are continuing to examine what that level of involvement was and the ambition behind it," he said.

"This is very much a live investigation, and our evidence gathering continues, but at this time our position remains the same; we consider it highly likely that there is Iranian state involvement," Taylor said.

The other five men are out on bail. Police have not released any of their names.

In late September, five men were arrested in the incident, and they were found with gasoline, hooded clothing and masks. The men were released on bail. Later, two more were arrested. British Prime Minister Andy Burnham announced that the plot was likely tied to Iran. Iran has denied the claim.

A few days after the arrests, the United States moved its bombers out of the air base.