By SJA Jafri + Agencies
Fakhrizadeh died in hospital after an attack in Absard, in Damavand County.
Iran’s Foreign Minister Mohammad Javad Zarif, has condemned the killing “as an act of state terror”.
Western intelligence agencies view Fakhrizadeh as being behind Iran’s secret nuclear weapons program.
He was reportedly described as the “father of the Iranian bomb” by diplomats.
News of the killing comes amid fresh concern about the increased amount of enriched uranium that Iran is producing. Enriched uranium is a vital component for both civil nuclear power generation and military nuclear weapons.
Iran insists its nuclear program is exclusively for peaceful purposes.
Between 2010 and 2012, four Iranian nuclear scientists were assassinated and Iran has accused Israel of complicity in the killings.
Fakhrizadeh’s name was specifically mentioned in Israeli PM Benjamin Netanyahu’s presentation about Iran’s nuclear program in May 2018.
In a statement on Friday, Iran’s defence ministry said: “Armed terrorists targeted a vehicle carrying Mohsen Fakhrizadeh, head of the ministry’s research and innovation organization.
“After a clash between the terrorists and his bodyguards, Fakhrizadeh was severely injured and rushed to hospital.
“Unfortunately, the medical team’s efforts to save him were unsuccessful and minutes ago he passed away.”
Iranian media reports said the attackers opened fire on the scientist in his car.
What has the reaction been?
“Terrorists murdered an eminent Iranian scientist today,” Iran’s foreign minister said in a tweet.
“This cowardice – with serious indications of Israeli role – shows desperate warmongering of perpetrators.”
The commander of the Islamic Revolutionary Guard Corps (IRGC) has said that Iran will revenge the killing of the scientist.
Who was Mohsen Fakhrizadeh?
Fakhrizadeh is the most renowned Iranian nuclear scientist and a senior officer of the elite Islamic Revolutionary Guard Corps.
He has long been spoken about by Western security sources as extremely powerful and instrumental in Iran’s weapons program.
“Remember that name,” Israeli Prime Minister Benjamin Netanyahu said as he identified Fakhrizedeh as the head scientist in the program.
In 2015, the New York Times compared him to J. Robert Oppenheimer, the physicist who directed the Manhattan Project that during World War Two produced the first atomic weapons.
There has been no comment from Israel on the news of the assassination.