Afghanistan’s Civil Aviation Authority on Monday said the country is raking in an estimated revenue of around $100,000 per day after the biggest international airlines began steering clear of Iranian airspace in wake of the flare-up of Iran’s tensions with the US earlier this month.

Iran’s top aviation official says the results of a probe into the crash of a Ukrainian passenger plane in Tehran will show what has happened, but Iran is certain no missile hit the aircraft.

Qatar Airways says it is expanding operations in Iran, despite US sanctions on the Islamic Republic and a diplomatic rift with Saudi Arabia over accusations that it had approached Tehran too closely.