The Ministry of Foreign Affairs is warning New Zealanders to leave Iran as soon as possible if it is safe to do so.A Safe Travel advisory says that the United States has ordered further military strikes across Iran.A limited number of flights are still operating from Khomeini International Airport in Tehran but airspace closures could occur at any time, it says.Land routes out of Iran via Turkey and Armenia are still viable and have been successfully used by other New Zealanders to leave the country.Anyone who cannot leave Iran should follow the advice of local authorities and move to or remain in a safe place and ensure they have essential supplies such as food, water, torches, batteries or power banks and any medications.The advisory says there are a number of steps people should take if they are at risk of drone or missile attacks.Know how advance warnings are communicated in the areaFollow all local authority instructionsIdentify the nearest shelter or safest locationsIf no shelter is available, move to a basement or interior room away from windowsAvoid any potential target locations, including military sites, airports and oil and energy infrastructureKeep in contact with family and friends where possibleNew Zealanders who need urgent consular assistance should contact the 24/7 consular emergency line on +64 99 20 20 20.MFAT upgraded its travel advisory on Wednesday night and "strongly" advises New Zealanders to avoid the Middle East.