Suicide bomber kills 10 people, mainly Germans, in Istanbul

By Ayla Jean Yackley ISTANBUL (Reuters) - A suicide bomber thought to be from Syria killed at least 10 people, many of them German tourists, in Istanbul's historic heart on Tuesday, an attack senior security officials said was probably planned by Islamic State. President Tayyip Erdogan condemned the bombing in Sultanahmet square, near the Blue Mosque and Hagia Sophia, major tourist sites in the center of one of the world's most visited cities.