Vahid Razavi, a member of the Vadi family, told the dissident media site that Rouzbeh Vadi was detained a year and a half ago after a dispute at work.

Executed Iranian nuclear scientist Rouzbeh Vadi only confessed to spying for Israel after torture and after the regime threatened his mother, a relative told Iran International in an article published Friday.

Vahid Razavi, a member of the Vadi family, told the dissident media site that Vadi was detained a year and a half ago after a dispute at work.

“Rouzbeh was tortured intensely, to the point that bones in his leg and two ribs were broken, and then his mother was arrested and jailed,” Razavi said.

Interrogators, he claimed, photographed Vadi’s mother in custody and showed the images to him “to extract a forced confession,” Razavi claimed.

The judiciary claimed Vadi was convicted after he transferred classified information about one of the scientists killed in the June attacks to Mossad.

Iranian nuclear scientists confesses to espionage for Israel

Interrogators forced Vadi to confess and deliver his confession in a televised address by threatening to torture his mother.

"Key facilities were Fordow and Natanz (uranium enrichment plants), for which I sent information. I told them I knew this and that about Fordow, they (Mossad agent) told me to send everything," Vadi said in what IRIB described as a confession video it ran on the air.

"The entry and exit of nuclear material into the Uranium Conversion Facility (UCF) and Fuel Manufacturing Plant (FMP) were very important to them," Vadi, who held a PhD in nuclear engineering from Amir Kabir University of Technology, added.

A voiceover in the video said that Vadi met five times with Mossad agents while in Vienna and was asked to open a cryptocurrency account to receive payment for his services. The defendant said in the video that Mossad had promised him a foreign passport should he complete a long-term collaboration.