The US Embassy in Turkey has called on US citizens to exercise caution during Ramadan following a bomb attack in Istanbul on 7 June . Commenting on the bombing , the advisory said : “ No group has claimed responsibility for the attack , but extremist individuals or groups continue to issue non - specific warnings of terrorist attacks during the Ramadan holiday . ” In Istanbul, two suicide bombing attacks killed 12 Germans and four foreigners respectively in January and March. The domestic security situation has deteriorated markedly in recent months . Key cities , including Istanbul and the capital , Ankara , have been repeatedly attacked . Foreigners , journalists , and the security forces have been targeted , with 16 foreign nationals killed during attacks in January and March .
The US Embassy in Turkey has called on US citizens to exercise caution during Ramadan following a bomb attack in Istanbul on 7 June . Commenting on the bombing , the advisory said : “ No group has claimed responsibility for the attack , but extremist individuals or groups continue to issue non - specific warnings of terrorist attacks during the Ramadan holiday . ” The domestic security situation has deteriorated markedly in recent months . Key cities , including Istanbul and the capital , Ankara , have been repeatedly attacked . Foreigners , journalists , and the security forces have been targeted , with 16 foreign nationals killed during attacks in January and March .