Al Alam, the Arabic-language channel of Iranian national television, made a similar statement saying that “satellite-controlled” weapons were used in the murder of Mohsen Fakhrizadeh on Friday.
However, the channel did not specify what type of weapons were used.
Iranian Minister of Foreign Affairs blamed Israel for the attack near the capital Tehran.
Mr Fakhrizadeh was traveling in a bulletproof car alongside three vehicles from security personnel when he heard what sounded like bullets hitting his car, Fars reported on Sunday.
It is said that he got out of the vehicle to see what had happened.
A Nissan equipped with a remote machine gun then opened fire on Mr. Fakhrizadeh from about 150 meters away, Fars reports.
The Iranian news agency added that Mr. Fakhrizadeh had been hit at least three times in an attack that lasted about three minutes.
Al Alam and Fars did not immediately present evidence to support their claims.
However, Ali Shamkhani, secretary of Iran’s Supreme National Security Council, also said that Israel used “electronic devices” to kill Mr. Fakhrizadeh.
Mr Shamkhani made the statements during his speech at the scientist’s funeral on Monday.
Iranian English-language television station Press TV reported that a weapon recovered from the scene of the attack bore “the logo and specifications of the Israeli military industry.”
Iranian authorities initially said a truck exploded before gunmen opened fire. Witnesses told state television that they saw gunmen on the ground during the attack.
Israel, long suspected of killing Iranian nuclear scientists over the past decade, declined to comment on the attack.
Mr. Fakhrizadeh’s funeral took place in an area outside the Iranian Defense Ministry in Tehran.
The scientist founded Iran’s military nuclear program two decades ago.
The United States and Israel alleged the program was a military operation examining the feasibility of building a nuclear weapon.
Israel insists Iran has ambition to develop such weapons, pointing to Tehran’s ballistic missile program and research into other technologies.
Iran has long maintained that its nuclear program is peaceful.
In response to the assassination, Iran’s parliament began consideration of a bill that would end inspections by the International Atomic Energy Agency.
British Minister of Foreign Affairs Dominic Raab Sky’s Sophy Ridge told Sky’s Sophy Ridge on Sunday: “We are concerned about the situation in Iran and the wider region. We want to see a de-escalation of tensions.
“We are still waiting to see all the facts about what happened in Iran, but I would say we are sticking to the rule of international humanitarian law, which is very clear against targeting civilians. ”