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According to Press TV, the authorities have arrested the perpetrators over the last few days, while the attacks were plotted for the holy month of Ramadan.
"Wherever it may occur in Iran, any suspicious move will be swiftly detected; this is thanks to the presence of the people and capable and experienced organizations," Shamkhani said, as quoted by the broadcaster on Monday.
Radical Islamist have planned a major terrorist attack in Tehran and other regions of Iran, the country's Ministry of Intelligence and Security (MOIS) said in a statement on Monday.
"One of the major terrorist plots by Takfiri-Wahhabi groups who have been planning to plant a bomb in Tehran and other provinces, has been prevented," the ministry said in the statement. Large amounts of explosives and bombs have been seized during operations to apprehend intruders, the statement read.
According to the statement, the Iranian authorities have launched an investigation with respect to those detained during the operations.
Comment: As T.J. Coles shows in his new book, Britain's Secret Wars, the West and their allies have been committing terrorism in Iran for generations, and it hasn't ended. Former State Department counterterrorism official Fred Burton even said in 2008 that the "[terrorist] attacks inside Iran fall in line with US efforts to supply and train Iran's ethnic minorities to destabilize the Iranian regime."