Mohsen Fakhrizadeh-Mahabadi

Iran has moved to stop UN inspections of its nuclear sites and step up uranium enrichment under a new law approved by its parliament.

 The bill would require the government to resume enriching uranium to 20% - well above the 3.67% agreed under a 2015 nuclear deal - if crippling sanctions are not eased in two months.

President-elect Joe Biden has signaled he will return the United States to a nuclear accord with Iran before quickly launching talks on other concerns, reviving diplomacy to ease soaring tensions.

Nationalist Movement Party (MHP) leader Devlet Bahçeli has criticized a main opposition party lawmaker for his comments on the Turkish army and has asked for an explanation for the same.

"The [Republican People's Party] CHP deputy's comment that the Turkish army is 'sold' is a dishonor that should be asked account for," he said, addressing the MHP lawmakers at the parliament.

A top Iranian official on Nov. 30 said nuclear scientist Mohsen Fakhrizadeh was killed in a new type of "complex operation", blaming arch-foe Israel and an exiled opposition group.

The "operation was very complex, using electronic equipment and no one was present at the scene," the secretary of Iran's Supreme National Security Council, Rear-Admiral Ali Shamkhani said.

In a speech at Fakhrizadeh's funeral in Tehran, security chief Ali Shamkhani said the attackers "used electronic equipment" and were not present at the scene. He gave no further details.

The Iranian defence ministry initially reported that Fakhrizadeh was shot when several gunmen targeted his car.

Iran began the burial of slain nuclear scientist Mohsen Fakhrizadeh in a cemetery in northern Tehran on Monday, state TV reported, as the defence minister promised the Islamic Republic would retaliate for his killing.

Turkey on Nov. 28 condemned the killing of Iran's top nuclear scientist Mohsen Fakhrizadeh.

"We regret that the Iranian scientist Mohsen Fakhrizadeh lost his life as a result of an armed attack in Tehran. We condemn this heinous murder and extend our condolences to the government of Iran and the family of the deceased," said the nation's Foreign Ministry.

Iran's President Hassan Rouhani on Nov. 28 accused arch-foe Israel of acting as a "mercenary" for the U.S., blaming the Jewish state for assassinating one of Tehran's most prominent nuclear scientists.

An Iranian scientist that Israel alleged led the Islamic Republic's military nuclear program until its disbanding in the early 2000s was killed in a shootout on Nov. 27, state television said.