Foreign Secretary Ed Miliband has summoned Iran's ambassador to the UK following an incident at RAF Fairford in Gloucestershire last month, telling him that "Britain will not tolerate threats on our soil."

Miliband said Iran's "continued attempts" to undermine UK security "through its criminal networks, proxy groups and state-backed malign activity is unacceptable."

Prime Minister Andy Burnham told MPs on Monday that the incident at the airbase was "almost certainly directed by Iran's Islamic Revolutionary Guard."

Iran's ambassador to the UK, Seyed Ali Mousavi, denied involvement and said Tehran was willing to cooperate with British authorities.

The Foreign Office has sanctioned two Iranians, including the head of the regime's counterespionage operations. Both men face travel bans and asset freezes. Burnham indicated Iran could face further sanctions over its suspected role.

The UK and 28 other countries, including the US, Canada, Australia, France and Germany, issued a joint statement condemning "in the strongest terms" violent attacks by Iran. The statement accuses Tehran of carrying out "lethal plotting, arson, sabotage, cyber-attacks, and other hybrid activities."

Police launched a major operation in the early hours of 27 September after officers were alerted to three suspicious vehicles near the base. Dozens of homes were evacuated in nearby Whelford and a large cordon was placed around the site. Seven men, all in their 20s, were arrested and later bailed. No one has been charged.

RAF Fairford, in the Cotswolds, has been used as a forward operating location by the US Air Force for decades. In recent months, the US has flown B-1 and B-52 bombers from the base for the Middle East after the UK approved an American request to use it for defensive strikes on Iran. Last week, Downing Street insisted the airbase was safe after the US withdrew about a dozen B-1 bombers to their home stations.

In July, Iran said "any base used for aggression against Iranian territory constitutes a legitimate target for our forces."

Home Secretary Shabana Mahmood was expected to provide an update on the incident in the Commons.