The United Arab Emirates on Tuesday banned all flights to and from Iran over the outbreak of the new coronavirus, just a day after its spread from the Islamic Republic was announced across multiple Mideast nations. Iran meanwhile raised the official death toll from the virus to 15 killed amid 95 confirmed infections.

The UAE, home to long-haul carriers Emirates and Etihad, remains a key international transit route for Iran’s 80 million people. The flight ban, which will last at least a week, shows the growing concern over the spread of the virus in Iran amid worries the outbreak may be larger than what authorities there now acknowledge.