Police officers work at the scene of a car bombing in Istanbul on Tuesday, June 7. At least 11 people were killed and 36 were injured when a car bomb targeted a police bus, according to Turkey's state-run Anadolu agency. IHA/AP
Officers secure the area near the scene of the attack. It took place in a busy neighborhood that includes the city's landmark Beyazit Square, the main Istanbul University campus and the Vezneciler metro station. Defne Karadeniz/Getty Images
Local media reported that the blast was remotely detonated as the bus passed by with a group of riot police on board. Defne Karadeniz/Getty Images
A police officer walks near the scene of the bombing, which happened during morning rush hour. Emrah Gurel/AP
A man walks past a building with broken windows from the blast. OZAN KOSE/AFP/Getty Images
No one immediately claimed responsibility for the bombing. Turkey has been rocked by a string of terror attacks over the past year. DHA/AP
A man cleans debris outside his shop near the scene of the blast. Emrah Gurel/AP
Security officials and firefighters work at the explosion site. DHA/ AP
Two men sit near the broken windows of a restaurant as police officers secure the area. Defne Karadeniz/Getty Images
The bus is covered and removed from the scene. Defne Karadeniz/Getty Images