The Saudi authorities have arrested 18 suspected spies, including an Iranian and a Lebanese, on charges of espionage for a foreign country, the interior ministry said on Tuesday. \"Sixteen Saudis, an Iranian and a Lebanese were arrested in coordinated and simultaneous operations in four regions of the kingdom,\" including the capital Riyadh and the holy city of Mecca, the ministry said in a statement. The suspects were working for a foreign country which it did not name, the statement added.