Nematollah Nassiri ( Persian : نعمت‌الله نصیری ; 4 August 1910 – 15 February 1979) was an Iranian military officer and intelligence chief who served as the third director of SAVAK , the Iranian intelligence agency and secret police during the rule of Mohammad Reza Pahlavi . He was also the Ambassador of Iran to Pakistan . Nassiri was among the 438 individuals arrested and executed in 1979 following the Iranian Revolution .