Bernard Phelan, a 64-year-old Irish man with dual French citizenship, revealed the harrowing experiences he endured during his imprisonment in Iran.

In an interview with RTÉ's Six One News, Phelan, a Paris-based tourism consultant, said he had been detained in Iran in October, marking his fifth visit to the country.

Phelan was arrested amid anti-regime protests that erupted across the country after the death of Mahsa Amini in police custody in September. Allegedly, Phelan had been capturing images of the protests and a mosque that had been set ablaze.

In mid-May, Iran eventually released Phelan, who had been sentenced to 6.5 years in prison on charges of "providing information to another country."

During his time in detention, Phelan faced severe physical and psychological hardships, leading to post-traumatic stress disorder (PTSD). He recounted the haunting words of a judge who warned him that he would "die in prison." This threat was a part of what he described as "white torture," a tactic employed to break prisoners psychologically.

"There are nightmares. I don't sleep well, I'm on sleeping tablets - nightmares of being on the floor and being kicked by somebody," Phelan noted.

Human rights organizations have raised concerns over what they call "hostage diplomacy" by Iran, where an undisclosed number of Western prisoners are being held. These individuals face charges of espionage or other alleged crimes, and some have been languishing in detention for extended periods without access to legal representation or a fair trial.

In response to the allegations, the Islamic Republic maintains that the prisoners are lawfully held for valid reasons and denies any wrongdoing.