Turkey has closed its border with Iran and halted incoming flights as a precaution to stop the potential spread of coronavirus after the neighboring country reported 43 cases of the disease, the health minister said on Sunday.

All highways and railways were closed as of 5 p.m. and flights from Iran suspended, Health Minister Fahrettin Koca told reporters. Flights from Turkey to Iran are still allowed.

Five people in the southeastern Turkish city of Van were found to not have coronavirus after being put under observation, Koca said. Turkey has been monitoring the border with thermal cameras in recent days, he added.

There are three main land crossings along the roughly 500 km border between Turkey’s southeast and Iran’s northwest.