Iranian authorities executed four people accused of working for Israel's Mossad intelligence agency, the state-run IRNA news agency has said.
IRNA said the country's powerful Revolutionary Guard had announced the arrests of a network of people linked to the Israeli agency.
It said the members had previous criminal records and tried to disrupt the country's security.
Israel and Iran are regional arch-enemies and Iran occasionally announces the detention of people it says are spying for foreign countries, including the United States and Israel.
Tehran does not recognise Israel and supports anti-Israeli armed groups across the region, including Hezbollah and Hamas.
Network members stole and destroyed private and public property and kidnapped individuals and interrogated them, according to the report.
It said the alleged spies had weapons and received wages from Mossad in the form of cryptocurrency. Iranian authorities provided no evidence for any of the alleged crimes.
IRNA identified the executed prisoners as Hossein Ordoukhanzadeh, Shahin Imani Mahmoudabadi, Milad Ashrafi and Manouchehr Shahbandi.
They were arrested and sentenced to death in June on charges of "intelligence co-operation with Israel".
Three other members of the group received sentences of five to 10 years in prison, according to the news agency, but they were not identified.
Iran's Revolutionary Court regularly hands out death sentences, although it remains unclear which court charged the four men in June.
The Revolutionary Court was established following the 1979 Islamic Revolution and is known for meting out harsh punishments to those who oppose Iran's clerical rulers.
According to Amnesty International, Iran executed at least 314 people in 2021, more than half the total state executions recorded across the Middle East that year.
Iran and Israel have long accused each other of spying.
Israel views Iran as its greatest threat and has repeatedly threatened to take military action to prevent Iran from acquiring nuclear weapons.
Iran denies it is seeking such weapons and has vowed a harsh response to any Israeli aggression.
In January, Israel said it had broken up an Iranian spy ring that recruited Israeli women via social media to photograph sensitive sites and gather intelligence.
In July, Iran said it had arrested members of an armed group linked to Mossad after they entered the country from across its western border.
In 2020, Iran executed a man convicted of leaking information to the US and Israel about a prominent Revolutionary Guard general who was later killed by a US drone strike in Iraq.
Israel also regularly carries out strikes on militant groups in neighbouring Syria. Tehran has been a main supporter of Syrian president Bashar Assad during the country's 11-year civil war, sending thousands of Iran-backed fighters from around the region to fight alongside his forces.
Israeli officials rarely discuss its operations but have said in the past they would work on preventing Iran's entrenchment in Syria.
