Iranian security forces have arrested several figures from the country's reformist movement, local media reported on Monday, as Tehran's crackdown on dissent continues to widen.

Those arrested include Azar Mansouri, the head of the Reformist Front, which represents several factions, former diplomat Mohsen Aminzadeh and Ebrahim Asgharzadeh, who was part of the group that stormed the US Embassy in Tehran in 1979.

According to a Tehran prosecutor's statement, quoted by Iranian state-run IRNA news agency, four people were arrested and others summoned for meetings with the authorities. The news agency said they were allegedly involved in "organizing and leading… activities aimed at disrupting the political and social situation" in the country amid military threats from the US and Israel.

The arrests come after a reformist statement issued in January that called on Iran's supreme leader Ayatollah Ali Khamenei to resign. It remains unclear how much support the reformist movement, which largely backed incumbent president Massoud Pezeshkian in the 2024 presidential election, has within Iran.

Meanwhile, detained Nobel Peace Prize laureate Narges Mohammadi has been sentenced to another seven years in prison.

Protests violently suppressed

The crackdown comes following the nationwide protests across Iran, in which thousands of protesters were killed by security forces, with thousands others being detained.

Iran's theocratic regime has violently suppressed any attempts to oppose its bloody treatment of the protests, while the nuclear negotiations with the US have also been in the background.

US President Donald Trump has repeatedly threatened Iran with military strikes if the two sides are not to reach a deal, with the US military moving aircraft carriers, ships and warplanes to the Middle East to pressure Iran into an agreement or, alternatively, be prepared for a potential attack, should Trump decide in favor of one.

Talks took place between Iran and the US in Oman on Friday. Iranian officials struck a positive note, also vowing to continue the negotiations over Iran's nuclear program.

Iran's Foreign Minister Abbas Araghchi hinted about Iran sticking to its position that the country must be able to enrich uranium, which is one of the main sticking points in the negotiations.

The negotiations with Iran are also expected to play a major role in Israeli Prime Minister Benjamin Netanyahu's trip to Washington later this week.

Edited by: Dmytro Hubenko