A bomb blast�has rocked the central Istanbul district of Vezneciler near a bus stop and some people are wounded, CNN Turk reports.�
The broadcaster said many ambulances were sent to the area on Tuesday.
The NTV broadcaster said the explosion occurred as a police vehicle was passing the area.
There was no immediate claim of responsibility but�Kurdish�militants, Daesh terrorists�and radical leftists have all staged�attacks in Turkey recently.