Iran, on Sunday, weighed its reaction to the killing of its top nuclear scientist, which it blames on Israel’s arch-foe, as his body was taken to Shiite shrines before being buried.

Following a firefight between his guards and unidentified gunmen outside Tehran, two days after Mohsen Fakhrizadeh died, parliament called for foreign inspectors to be banned from nuclear facilities in a statement. Iran’s Supreme National Security Council usually handles decisions related to the country’s nuclear programme.

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President Hassan Rouhani has stressed the country will seek its revenge in “due time” and not be rushed into a “trap”.

Israel says Fakhrizadeh was the head of an Iranian military nuclear programme, the existence of which the Islamic republic has consistently denied.

His body arrived in the northeastern holy city of Mashhad late Saturday and was taken to the shrine of Imam Reza for prayers and a ceremonial circling of the tomb, state news agency IRNA reported.

The body was taken Sunday to Fatima Masumeh’s shrine in Qom, south of Tehran, and later to that of the Islamic republic’s founder Imam Khomeini, according to Iranian media.

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Fakhrizadeh’s funeral will be held Monday in the presence of senior military commanders and his family, the defence ministry said on its website, without specifying where.

Israel has declined to comment on Fakhrizadeh’s killing, less than two months before US President-elect Joe Biden is set to take office following four years of hawkish foreign policy under President Donald Trump.

Trump withdrew the US from a multilateral nuclear agreement with Iran in 2018 and then reimposed and beefed up punishing sanctions as part of its “maximum pressure” campaign against Tehran.

Biden has signalled his administration may be prepared to rejoin the accord, but the nuclear scientist’s assassination has revived opposition to the deal among Iranian conservatives.

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On Sunday, Iran’s parliament held a closed session to “investigate the assassination,” ISNA news agency reported.

Speaker Mohammad-Bagher Ghalibaf called Sunday for “a strong reaction” that would “deter and take revenge” on those behind the killing of Fakhrizadeh, who was aged 59 according to Iranian media.

Iran’s supreme leader Ayatollah Ali Khamenei called Saturday for Fakhrizadeh’s killers to be punished.

On Sunday, parliament said the “best response” to Fakhrizadeh’s assassination would be to “revive Iran’s glorious nuclear industry” by halting the voluntary implementation of the additional protocol, a document which under the 2015 accord prescribes more intrusive inspections of Iran’s nuclear facilitates.