The process of releasing US prisoners held in Iran will take up to two months, Iran's Foreign Ministry Spokesperson Nasser Kanaani said on Monday during a press conference. "A specific time frame has been announced by relevant authorities, and it will take a maximum of two months for this process to take place," Kanaani said. Last month, Tehran and Washington reached an agreement whereby five US citizens held in Iran would be freed while $6 billion of Iranian assets frozen in South Korea would be released.