Iranian nuclear scientist assassinated Friday was shot by a remote-controlled machine gun operating out of another car, the semi-official Fars News Agency said Sunday.
With top Iranian officials blaming Israel, Supreme Leader Ayatollah Seyyed Ali Khamenei and others have promised revenge for the killing of Mohsen Fakhrizadeh, who was the country's chief nuclear scientist, reports CNN.
There were conflicting accounts from Iranian news agencies about how the attack unfolded.
One report published Sunday from Fars News said Fakhrizadeh was traveling with his wife Friday in a bulletproof car, alongside three security personnel vehicles, when he heard what sounded like bullets hitting a vehicle, and he exited the car to determine what had happened.
When he exited the vehicle, a remote-controlled machine gun opened fire from a Nissan stopped about 150 meters (164 yards) from Fakhrizadeh's car, Fars News said.
Fakhrizadeh was hit at least three times, according to Fars News. His bodyguard was also shot. Following the gunfire, the Nissan exploded, Fars News reported, adding the attack lasted three minutes.
However, CNN could not independently confirm the news agency's version of events.
The semi-official Iranian Students News Agency (ISNA) also reported Fakhrizadeh's car was hit by gunfire, followed by an explosion and more gunfire, citing Iranian Defense Minister Brig. Gen. Amir Hatami.
"Based on reports received from members of his security detail, Mr. Fakhrizadeh's vehicle was initially targeted by gunfire, after which a Nissan vehicle laden with explosives was set off in close proximity to them as gunfire, targeting their vehicle, was continuing," Hatami said, according to ISNA.
IRIB, Iranian state television, said the explosion happened first, followed by gunfire from attackers.
Seyed Kamal Kharrazi, the head of Iran's Strategic Council on Foreign Relations, compared the assassination to the killing of Qasem Soleimani, the state-run Islamic Republic News Agency reported Sunday. Soleimani, the leader of the Islamic Revolutionary Guards Corps' Quds Force, was killed in a US drone strike earlier this year in Iraq.
"Undoubtedly, the Islamic Republic of Iran will give a calculated and decisive answer to the criminals who took Martyr Fakhrizadeh," Kharrazi was quoted as saying.
Fakhrizadeh was the head of the research center of new technology in the elite Revolutionary Guards and was a leading figure in Iran's nuclear program.