A worker rides a bicycle in front of the reactor building of the Bushehr nuclear power plant in Iran. Photo: VCG

Negotiations in Vienna aimed at salvaging Iran's nuclear deal with world powers will not resume before the country's new government takes office in August, an Iranian official said Saturday.

The Islamic republic has held talks since April in Vienna with major powers on reviving its troubled 2015 nuclear agreement. "We're in a transition period...  #Vienna_talks must thus obviously await our new administration," Abbas Araghchi, Iran's deputy foreign minister, said on Twitter. 

"This is what every democracy demands," added Araghchi, who is also head of the country's nuclear negotiation team.

Ultra-conservative Ebrahim Raisi won a presidential election in June and will on August 5 replace moderate President Hassan Rouhani, who has served the constitutionally permitted maximum of two consecutive terms. 

The 2015 accord offered Tehran international sanctions relief in exchange for limiting its nuclear program, but was torpedoed in 2018 when former US president Donald Trump withdrew from it and reimposed sanctions.

A sixth round of talks concluded on June 20 and dates for the next round have not been fixed. Iran's ultraconservative camp, which deeply distrusts the US, has repeatedly attacked Rouhani over the failing nuclear deal, which was originally negotiated and came into effect under his stewardship.

Despite this, Iran's senior political figures, including Raisi, have voiced broad agreement that the country must seek an end to the punishing US sanctions.