IRAN has executed four men it says were linked to an Israeli bomb plot on a weapons factory. The four men were allegedly trained by the Israeli intelligence agency in an African country before entering Iran from Iraq's Kurdistan region. The plot was allegedly averted by Iranian intelligence, reports said. Iran claims Israel has killed a number of Iranian leaders and scientists, allegations that Tel Aviv neither admits nor rejects. The president said that the three American service members killed were "patriots in the highest sense" as he vowed to hold those responsible for their deaths to account.