Nervous governments, worried about the threat of aerial drones, fear that model aircraft fitted with cameras could be used to photograph sensitive locations and military bases, the Arab News website reports . While there's currently no ban in place, Saudi Customs told Arab News that strict controls require people to obtain a permit from the interior ministry if they want to bring flying model aircraft into the country. Passengers arriving into the kingdom have had to surrender metal toys for several days so that they can be properly inspected, the website reports. In Bahrain, officials say their measures are "precautionary", and they have yet to seize any items. One security expert praised the measures, saying controls on "war toys" are needed to neutralise threats from terrorist groups who want to disrupt security in the Gulf.