The latest on the explosion in historic center of Istanbul. All times local:

11:10 a.m.

The private Dogan news agency says at least two people were hospitalized following an explosion in the historic center of Istanbul.

State-run TRT television says the blast was likely caused by a suicide bomber, but authorities have not commented on the cause.

Private NTV television said the explosion was close to a park that is home to a landmark obelisk. The state-run Anadolu Agency says several police and medics were sent to the area.