Iranian authorities said Monday they had thwarted a number of bombing plots in the capital Tehran and other cities around the country, state TV reported. The planned attacks have been described as the "biggest terrorist plot" to ever target the capital city of the Shiite nation.

Iran’s Intelligence Ministry said Monday the plot was planned by Sunni Muslim militants to target the Shiite Islamic republic. State TV reported that several suspects were arrested and were being questioned over the plot after authorities seized ammunition and bombs. The attack was planned to be carried out during the Muslim holy month of Ramadan, semi-official Fars news agency quoted Ali Shamkhani, the secretary of Iran's Supreme National Security Council.

"In a criminal plot of the anti-Islamic terrorist takfiri groups, a series of bombings had been planned in several places of the country for the coming days ... the terrorists were arrested and some bombs and a huge amount of explosives were seized," the ministry said in a statement on state news agency IRNA, referring to the militants as takfiri, a term used for hardline Sunni Muslims who see other Muslims as infidels.