The Iranian Intelligence Ministry said at a press conference on Monday that it had identified and arrested 17 spies acting on behalf of the US Central Intelligence Agency (CIA).
The United States has warned it will bring down any Iranian drones that fly too close to its ships, following a string of incidents on the world's most vital oil shipping route.
Trump said the U.S.S. Boxer "took defensive action" against an Iranian drone over the Strait of Hormuz.
Iran seized a foreign vessel with 12 crew accused of smuggling fuel in the Gulf, state television quoted Iran's Revolutionary Guards as saying on Thursday.
Euronews has looked into the details of the enrichment process, and how much of this is necessary to create a nuclear-grade weapon.
NBC News could not independently confirm the reports and the CIA said it had no comment.
The US national security adviser John Bolton spoke in Jerusalem about new sanctions against Iran and other Middle East political issues.
President Donald Trump has threatened Iran with "obliteration" if it strikes "anything American" after Tehran dismissed new U.S. sanctions as "useless."
The president spoke about his decision-making in an exclusive interview with NBC's Chuck Todd for "Meet the Press."
Iranian State Television released a video on Friday claiming it showed the retrieval of a US military drone that was downed by Iran.
Both sides are presenting evidence that they say supports their narratives around the shooting down of a drone.
The dispute between the US and Iran has expanded from Twitter into a standoff in the Middle East.
The businessman was held for almost four years, accused of spying.
The emergency meetings in Mecca come just as the United States plans to beef up its troops in the Gulf after attacks on oil assets there, which it blames on Tehran.
The UAE says that four commercial vessels were sabotaged in the incident, two of them Saudi oil tankers.
Tensions between the US and Iran increased after Washington accused Iran of masterminding the attacks on two oil tankers in the Strait of Hormuz
The nuclear agreement with Iran tops the agenda at urgent talks between US Secretary of State Mike Pompeo and European officials in Brussels
Trump administration slaps new sanctions on Iran's industrial metals.
The Trump administration on Monday told five nations, including allies Japan, South Korea and Turkey, that they will no longer be exempt from U.S. sanctions if they continue to import oil from Iran.
Watch: Iran's lawmakers wear Revolutionary Guards' uniforms to Parliament after the US named the country's military elite as a foreign terrorist organization.
U.S. to designate elite Iranian force as terrorist organisation
Iranian photographer is angry that the US president used her picture in a Tweet condemning her country's government.
In this edition of the Brief we report on the state of play for Brussels on Brexit (from keep calm, to remain calm), a shortage of confectionary if No deal plays out and EU sanctions on Iran over attempted assassinations.
Last year it was North Korea, this year Iran may be in the US president's crosshairs at the UN General Assembly. Both American President Donald Trump and Iranian President Hassan Rouhani will address the UN General Assembly today, but it's unlikely they'll meet after Rouhani shot the idea down.
After President Donald Trump used last year’s UN General Assembly to outline his ‘’America First’’ policy, many nations are stressing the importance of old alliances and partnerships.
The move by British Airways, KLM and Air France comes months after U.S. President Donald Trump announced he would re-impose sanctions on Tehran.