Suicide Bombing in Istanbul

Rescue teams gather at the scene next to bodies after an explosion in the heart of Istanbul's historic Sultanahmet tourist district, in central Istanbul, Jan. 12, 2016.

Ambulances and firefighters stationed near the city's landmark Sultan Ahmed Mosque or Blue Mosque after an explosion at Istanbul's historic Sultanahmet district, Jan. 12, 2016.

Police search the area at the historic Sultanahmet district after an explosion in Istanbul, Jan. 12, 2016.

Standing in front of the Sultan Ahmed Mosque, better known as the Blue Mosque in the historic Sultanahmet district of Istanbul, a police officer secures the area after an explosion, Jan. 12, 2016

Police and media gather in front of the Blue Mosque at the historic Sultanahmet district after an explosion in Istanbul, Jan. 12, 2016.

Police patrol at the historic Sultanahmet district after an explosion in Istanbul, Jan. 12, 2016.