Iran has warned Donald Trump not to take any action against the country’s Supreme Leader Ayatollah Ali Khamenei, days after the U.S. president called for an end to Khamenei’s near 40-year reign. “Trump knows that if any hand of aggression is extended toward our leader, we not only cut that hand but also we will set fire to their world,” Gen. Abolfazl Shekarchi, a spokesman for Iran’s armed forces, said Tuesday. Trump has drawn two red lines for the Islamic Republic — the killing of peaceful protesters and Tehran conducting mass executions in the wake of the demonstrations. Activists say at least 4,484 people were killed during the protests.