"Today, I’m very concerned about the possibility of amputation of fingers that may be implemented to three men who have been convicted of theft,” said Mai Sato.
"Corporal punishment, including amputation, is absolutely prohibited under international law. And if executed, will amount to torture or ill-treatment," she said.
Earlier, rights group Amnesty International said the three men — Hadi Rostami, Mehdi Sharfian, and Mehdi Shahivand — held in Urumieh Central Prison in northwestern Iran, were informed by prosecution authorities last month that their sentences would be implemented as early as 11 April.
Amnesty said the same prison carried out amputations on two brothers last October using a guillotine device, raising alarm that authorities are prepared to enforce further amputation sentences.
Despite violating Article 7 of the International Covenant on Civil and Political Rights (ICCPR), to which Iran is a party, the court had sentenced the three men to “have four fingers on their right hands completely cut off so only the palm of their hands and thumbs are left”.