Egypt has imposed restrictions on female citizens travelling to Turkey, police said Sunday, months after introducing similar measures for men to stop them joining the Islamic State of Iraq and al-Sham (ISIS) group.Women aged 18 to 40 are now required to obtain security clearance before going to Turkey, a senior police officer told AFP, without specifying why."A security clearance can be acquired within 72 hours, and it is now mandatory for women travelling to this country (Turkey)," the officer said.The restriction took effect on Thursday, a Cairo airport official said.In March Egypt's state-sponsored Islamic authority, Dar al-Ifta, warned women against marrying ISIS fighters over the Internet.The compulsory security clearance for men, introduced in December, applies to war-torn Libya as well as Turkey.