According to state media reports, two aerospace experts died in "operations" in Iran.
Ali Kamani, a member of the Iranian Revolutionary Guards' Aerospace Branch, was "martyred" while on a "mission" in the city of Khomein in the center of the country, the Fars news agency reported on Monday.
In a separate incident in the northern Iranian province of Semnan, 33-year-old aviation specialist Mohammad Abdus also died.
Nothing was initially known about the circumstances of the deaths.
Just two weeks ago, Colonel Ali Esmailsadeh, a commander of the Al-Quds Brigades, died in an accident at his home, according to state media reports.
The Al-Quds Brigades are an elite unit of the Revolutionary Guards and are responsible for operations abroad.
Before that, on May 22, Colonel Sajjad Chodai, a high-ranking member of the Revolutionary Guards, had been assassinated in Tehran.
According to a report in the New York Times, Israel is said to be behind the assassination.
According to Iranian state media, Khodai was deployed to the Al-Quds Brigades in Syria and Iraq.
The Iranian Revolutionary Guards are on the US terror list.