The hajj has become a contentious issue as tensions between the two Mideast powers escalated after last year's hajj disaster killed at least 2,426 people.
Saeed Ohadi, head of Iran's Hajj and Pilgrimage Organisation, said today that "Saudi Arabia knows it will pay a heavy price" for its behavior.
In the wake of the 2015 disaster, Iran had demanded additional security guarantees but a second round of talks in Saudi Arabia this week failed to resolve the issue.
