New advice for Australians visiting Turkey

Australian travellers are being warned to exercise "heightened vigilance" in public places in Turkey following a deadly terrorist attack in Istanbul.

At least 10 foreigners were killed, most of them German tourists, in the blast at Sultanahmet square, near the major tourist sites of the Blue Mosque and Hagia Sophia on Tuesday.

The overall level of advice for Australians in Turkey remains at level two - exercise a high degree of caution - but the Department of Foreign Affairs and Trade on Wednesday advised travellers to exercise heightened vigilance in public places.