Tehran : Iran’s President Hassan Rouhani Saturday accused arch-foe Israel of acting as a “mercenary” for the US, blaming the Jewish state for assassinating one of Tehran’s most prominent nuclear scientists.

Mohsen Fakhrizadeh was “martyred” after being seriously wounded when assailants targeted his car and engaged in a gunfight with his bodyguards outside the capital Tehran on Friday, according to Iran’s defence ministry.

“Once again, the wicked hands of the global arrogance, with the usurper Zionist regime as the mercenary, were stained with the blood of a son of this nation,” Rouhani said in a statement on his official website.

Iran, a major Shiite power, generally uses the term “global arrogance” to refer to the United States.

Rouhani vowed that his death “does not disrupt” Iran’s scientific progress and said the killing was due to the “weakness and inability” of Tehran’s enemies to impede its growth.

He offered condolences to “the scientific community and the revolutionary people of Iran.”

The defence ministry said that Fakhrizadeh, who headed its reasearch and innovation organisation, died after medics failed to revive him.

Iran’s foreign minister Mohammad Javad Zarif said on Friday that there were “serious indications of an Israeli role” in the assassination.

The United States slapped sanctions on Fakhrizadeh in 2008 for “activities and transactions that contributed to the development of Iran’s nuclear programme”, and Israeli Prime Minister Benjamin Netanyahu once described him as the father of Iran’s nuclear weapons programme.

Fakhrizadeh was targeted while travelling near Absard city in Tehran province’s eastern Damavand county.

The New York Times said an American official and two other intelligence officials confirmed Israel was behind the attack, without giving further details.

Lebanon’s Hezbollah said early Saturday that it “strongly condemns the terrorist operation that led to the martyrdom of the distinguished scientist and university professor Mohsen Fakhrizadeh.”

The powerful Shiite movement added that it asks “God Almighty” to elevate him to the highest ranks “alongside his predecessors of martyrs and scholars, especially those who were treacherously martyred at the hands of Zionist and international gangs of murder and terrorism”.