Iran’s President Hassan Rouhani sought to prevent further damage to his hopes of salvaging the 2015 nuclear deal with world powers, pushing back against legislation that would end atomic inspections and increase uranium enrichment.

The parliament dominated by conservative hardliners had fast-tracked the law’s passage on Tuesday after Iran accused Israel and the U.S. of killing Mohsen Fakhrizadeh, a top nuclear scientist last week.

READ MORE: Iran moves ahead on bill that could end nuclear inspections

The UN’s International Atomic Energy Agency has played down the bill’s significance as a domestic matter that has had no bearing on cooperation between Iran and the agency

Lawmakers also hardened some of its provisions, seeking to impel Rouhani’s government to bar visits by a United Nations watchdog, and scale-up some nuclear activities, as early as next month, if the US doesn’t lift key sanctions.

The legislation requires approval from the powerful Guardian Council to become law.

“Of course the government does not agree with that ruling and sees it as harmful to diplomatic efforts,” Rouhani told a cabinet meeting on Wednesday, the state-run Islamic Republic News Agency reported.

ALSO READ: Iran official accuses Israel of assassinating top nuke scientist

The UN’s International Atomic Energy Agency has played down the bill’s significance as a domestic matter that has had no bearing on cooperation between Iran and the agency.

Increased tensions over Iran’s nuclear program and incidents like the killing of Fakhrizadeh could complicate life for the incoming Biden administration, which has pledged to end President Donald Trump’s economic offensive against Tehran and re-engage diplomatically.

Iran said on Wednesday that the Ministry of Intelligence had “identified relevant individuals” involved in the assassination, the semi-official Tasnim news agency reported. Israel hasn’t commented on the claim it was behind the killing.