Iran sentenced on Tuesday a man to death for allegedly spying for the CIA.
It jailed two others for 10 years for the same crime and imprisoned a fourth person for 10 years for spying for Britain, the judiciary said on Tuesday.
It was not immediately clear if any of the cases were linked to Tehran’s announcement in July that it captured 17 spies working for the CIA.
"One person has been sentenced to death for spying for America's intelligence service ... but the ruling has been appealed," judiciary spokesman Gholamhossein Esmaili was quoted as saying by the judiciary's news website Mizan.
The individual has appealed the sentence and a final decision will be made by the appeals court, he revealed.
The other two men, identified as Ali Nefriyeh and Mohammad Ali Babapour, received final 10-year sentences for spying for the CIA, and were ordered to repay $55,000 they had received, he said.
Mohammad Amin-Nasab was sentenced to 10 years in prison for spying for British intelligence, Esmaili said.
Iran often hands down heavy sentences on similar charges. In August, three people were sentenced to between 10 and 12 years on security and spying charges.
The verdicts come amid spiralling tensions between Tehran and the United States since President Donald Trump last year withdrew from Iran's 2015 nuclear deal with major powers and reimposed sanctions that have crippled Iran's economy in order to force Tehran to renegotiate the pact.