Iran says it has arrested 17 spies who it says were working for the CIA, and sentenced some of them to death.
The intelligence ministry said the suspects had been collecting information in vital sectors – including military and nuclear areas of activity.
US President Donald Trump has dismissed the claims, saying the report is “totally false”.
Tensions have escalated in recent weeks between Washington and Tehran.
President Trump last year abandoned the international nuclear deal with the Iranians, and the US has imposed sweeping economic sanctions on them.
Taiwan National Day Celebration
