Treasury Department designates 3 state entities under a counterterrorism authority, making it more difficult for a potential Biden administration to reverse move

Iranian FM Zarif lashes out at Trump administration amid American efforts to increase pressure on his country

Investigators quickly tracked down attackers based in Iran due to oversight in video meant to intimidate Americans ahead of election, Reuters reports

Both Tehran and Moscow obtained voter registration with the goal of interfering in election; FBI director says US will impose costs on any foreign countries interfering in vote

Tehran says it doesn't plan a 'buying spree' for upgraded equipment; Washington warns of sanctions against any who engage in weapons trade with Islamic Republic

Defense minister calls on countries around the world to confront Tehran after US bid to renew international ban on weapons sales to the Islamic Republic fails

5 years after nuclear deal took effect, 'all restrictions on transfer of arms terminated,' Islamic Republic says, hailing world's position 'in defiance of US regime's efforts'

Officials claim electronic assault perpetrated by 'sworn enemies' who failed to achieve their goals through sanctions

State media says assault did not cause significant damage but some other departments temporarily took down online services as precaution

During a 'radio rally' with conservative talk show host Rush Limbaugh, US president says Tehran has been warned: Don't 'fuck around with us'