Residents protested in at least four districts of Istanbul, witnesses said. Video and pictures posted on social media showed small pockets of protesters taking to the streets in some areas.
Turkey declares victory in referendum on expanding Erdogan powers
With 99 percent of ballot boxes opened, the "yes" vote for constitutional changes handing Erdogan sweeping new powers stood at 51.3 percent, according to the state-run Anadolu agency. But Turkey's three biggest cities, including Istanbul, voted "no".
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ