Turkey has been rocked by four suicide bombings already this year, the most recent last month in Istanbul. Two of those have been blamed on Islamic State of Iraq and the Levant (ISIL), while Kurdish fighters have claimed responsibility for the other two.
The US embassy emailed what it called an "emergency message" to Americans, warning of "credible threats" to tourist areas in Istanbul and the resort city of Antalya. Israel announced "immediate risks" .... http://www.aljazeera.com