Turkish Interior Minister Soylu said there are 69 people in hospital,16 foreigners among 39 killed in Istanbul nightclub attack. He added that search continues for attacker. Meanwhile, The Australian government advised on its Smart Traveller website that travellers should "exercise a high degree of caution" in Turkey and to reconsider their need to travel to Ankara and Istanbul. "The Australian Embassy in Ankara is liaising with local authorities to determine whether any Australians may have been involved in the nightclub attack that occurred in Ortakoy, Istanbul, on the morning of 1 January," a spokeswoman for the Department of Foreign Affairs and Trade told AAP. The club, popular with locals and foreigners alike, overlooks the Bosphorus Strait separating Europe and Asia in the city's cosmopolitan Ortakoy district. Around 500 to 600 people were thought to have been inside when the gunman opened fire early on Sunday, broadcaster CNN Turk said. Media outlets reported that 8 of the wounded in the Istanbul nightclub attack are in critical condition. Istanbul governor 'Vasip Sahin' said at least 35 people killed and at least 40 people wounded in terror attack involving one gunman at the nightclub.