Iran's Intelligence Ministry says it has arrested four Britain-linked terrorists in the western city of Marivan, who carried out five assassinations in the last two years, Press TV reported.
The ministry said it has disclosed documents and confiscated weaponry from the terrorist group.
The detainees said they were given promise of 20,000 US dollars for each murder, but they only received 8,000 dollars after accomplishing the mission.
They have confessed to getting orders in the Iraqi city of Suleymaniye from their commander "Jalil Fattahi" who is now residing in the United Kingdom.
Fattahi is one of the commanders of the Komala terrorist group which has been perpetuating several assassinations in the western cities of Iran since the Islamic Revolution in 1979.
The arrested terrorists, Majid Bakhtiar, Hajeer Ebrahimi, Loqman Moradi and Zanyar Moradi, are members of the Komala group.
According to detainees, Fattahi who has also been charged with several assassinations in Iran, gave them the order in Suleymaniye and delivered weapons and the cash on the Iran-Iraq border.
The news of these arrests comes after the head of Britain's secret intelligence service (MI6), John Sawers, announced publicly on October 28th that his agency is carrying out spying activities in Iran in order to stop the country's nuclear activities.
Iran's Intelligence Ministry said Britain has not only carried out secret espionage activities in the country, but also funded and supported certain terrorist groups against the Islamic Republic.